This reverts commit 7446cee7.

This reverts commit 3ae1a491.

  - retain failsafe check (constant/blockMeshDict)

previous disabling of the TimeSelection arrays [commit c52b20b1..]
resulted in the mesh caching being disabled :(

Simplified code is enabled/disabled by PV3FOAM_TIMESELECTION define.
Might be removed in the future.

 Added doc/Doxygen/tools/find-debugNames to help but the problem requires
 more attention (Henry/Andy/Mattijs?)
 Caveat:
   - names defined with nested defines will be missed.
   - names defined via typename will be missed.

Cleanup example:

#!/bin/sh
(
cd $WM_PROJECT_DIR
doc/Doxygen/tools/find-debugNames|tee debugs.orig|sed -e 's@ *//.*$@@'>debugs
diff -uw etc/controlDict debugs > debugs.diff
echo "hand-resolve the conflicts - see debugs.diff"
)

 - it also found things like size_t instead of size_type in fileName class

 - allows post-processing functions with an optional dictionary
   (eg, the developer can hard-wire some defaults)

compatibility.