ENH: add optional checkGzip parameter to fileName::type(..) method
- this simplifies use of a unified test for directory or file. fileName::Type what = myfile.type(true, true); if (what == FILE) ... if (what == DIRECTORY) ... - Use distinct bit values for fileName::Type, for possible use in the future. - related to issue #1121, since we need a more flexible way of expanding file or directory. An alternative would be to add checkGzip to Foam::exists() and Foam::type() functions, but that would make the code there more confusing and in the fileHandler classes.