ENH: add tags marking user configuration sections

- as per bashrc,cshrc delimit with
      "# USER EDITABLE PART"
      "# END OF (NORMAL) USER EDITABLE PART"

  this can help simplify any patching for system-building scripts etc.

etc/config.csh/ADIOS

@@ -47,10 +47,12 @@
 #     be used during the build process. See further notes there.
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 set adios_version=ADIOS-1.11.1
 setenv ADIOS_ARCH_PATH $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$adios_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if ($?FOAM_VERBOSE && $?prompt) then
     echo "Using adios ($adios_version)  ->  $ADIOS_ARCH_PATH"

etc/config.csh/CGAL

@@ -49,6 +49,7 @@
 #     be used during the build process.
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 set boost_version=boost_1_62_0
 set cgal_version=CGAL-4.9
@@ -56,6 +57,7 @@ set cgal_version=CGAL-4.9
 setenv BOOST_ARCH_PATH $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$boost_version
 setenv CGAL_ARCH_PATH $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$cgal_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if ($?FOAM_VERBOSE && $?prompt) then
     echo "Using boost ($boost_version)  ->  $BOOST_ARCH_PATH"

etc/config.csh/FFTW

@@ -47,11 +47,12 @@
 #     be used during the build process.
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 set fftw_version=fftw-3.3.5
-
 setenv FFTW_ARCH_PATH $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$fftw_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if ($?FOAM_VERBOSE && $?prompt) then
     echo "Using fftw ($fftw_version)  ->  $FFTW_ARCH_PATH"

etc/config.csh/paraview

@@ -50,12 +50,13 @@
 #         unsetenv ParaView_VERSION     # avoid using ThirdParty settings
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 setenv ParaView_VERSION 5.0.1
 setenv ParaView_MAJOR detect            # Automatically determine major version
-
 set cmake_version=cmake-system
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 
 if ( ! $?ParaView_DIR ) setenv ParaView_DIR

etc/config.csh/vtk

@@ -41,6 +41,7 @@
 # See the BuildIssues.txt about problems that can be encountered when using
 # the 'plain' VTK sources.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 set vtk_version=VTK-7.1.0
 set mesa_version=mesa-13.0.1
@@ -48,6 +49,7 @@ set mesa_version=mesa-13.0.1
 setenv VTK_DIR $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$vtk_version
 setenv MESA_ARCH_PATH $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$mesa_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if ($?FOAM_VERBOSE && $?prompt) then
     echo "Using vtk  ($vtk_version)  ->  $VTK_DIR"

etc/config.sh/ADIOS

@@ -46,10 +46,12 @@
 #     for the appropriate MPI. Eg, libadios_openmpi-system
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 adios_version=ADIOS-1.11.1
 export ADIOS_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$adios_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if [ "$FOAM_VERBOSE" -a "$PS1" ]
 then

etc/config.sh/CGAL

@@ -48,6 +48,7 @@
 #         - boost_version / cgal_version variables are retained.
 #         - the LD_LIBRARY_PATH is not adjusted.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 boost_version=boost_1_62_0
 cgal_version=CGAL-4.9
@@ -55,6 +56,7 @@ cgal_version=CGAL-4.9
 export BOOST_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$boost_version
 export CGAL_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$cgal_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if [ "$FOAM_VERBOSE" -a "$PS1" ]
 then

etc/config.sh/FFTW

@@ -46,11 +46,12 @@
 #         - fftw_version variable is retained.
 #         - the LD_LIBRARY_PATH is not adjusted.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 fftw_version=fftw-3.3.5
-
 export FFTW_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$fftw_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if [ "$FOAM_VERBOSE" -a "$PS1" ]
 then

etc/config.sh/ccmio

@@ -35,8 +35,10 @@
 #     A csh version is not needed, since the values here are only sourced
 #     during the wmake process
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 ccmio_version=libccmio-2.6.1
 export CCMIO_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$ccmio_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------

etc/config.sh/gperftools

@@ -46,11 +46,12 @@
 #         - gperftools_version variable are retained.
 #         - the LD_LIBRARY_PATH and PATH are not adjusted.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 gperftools_version=gperftools-2.5
-
 GPERFTOOLS_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$gperftools_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if [ "$FOAM_VERBOSE" -a "$PS1" ]
 then

etc/config.sh/metis

@@ -52,9 +52,10 @@
 #     by creating an empty one with the same name at a user or site location.
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 METIS_VERSION=metis-5.1.0
-
 export METIS_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER$WM_PRECISION_OPTION$WM_LABEL_OPTION/$METIS_VERSION
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------

etc/config.sh/paraview

@@ -53,12 +53,13 @@
 #     When _foamAddLib is unset (eg, called from makeParaView or from foamPV):
 #         - the ParaView_VERSION variable is retained.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 ParaView_VERSION=5.0.1
 ParaView_MAJOR=detect                   # Automatically determine major version
-
 cmake_version=cmake-system
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 
 # Clean PATH and LD_LIBRARY_PATH

etc/config.sh/scotch

@@ -52,9 +52,10 @@
 #     by creating an empty one with the same name at a user or site location.
 #
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 SCOTCH_VERSION=scotch_6.0.3
-
 export SCOTCH_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER$WM_PRECISION_OPTION$WM_LABEL_OPTION/$SCOTCH_VERSION
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------

etc/config.sh/vtk

@@ -41,6 +41,7 @@
 # See the BuildIssues.txt about problems that can be encountered when using
 # the 'plain' VTK sources.
 #------------------------------------------------------------------------------
+# USER EDITABLE PART: Changes made here may be lost with the next upgrade
 
 vtk_version=VTK-7.1.0
 mesa_version=mesa-13.0.1
@@ -48,6 +49,7 @@ mesa_version=mesa-13.0.1
 export VTK_DIR=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$vtk_version
 export MESA_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$mesa_version
 
+# END OF (NORMAL) USER EDITABLE PART
 #------------------------------------------------------------------------------
 if [ "$FOAM_VERBOSE" -a "$PS1" ]
 then