v3.2
build: ccache works better without embedded version strings
maint: update copyright year ranges to include 2011
maint: remove inclusion of unused header, for "make syntax-check"
diff, sdiff: new option --ignore-trailing-space (-Z)
maint: avoid new "make sytnax-check" failure.
diff: --ignore-file-name-case now applies at top level too
* src/io.c (find_and_hash_each_line): Refactor for brevity.