including modifications according to code review
+ backport of the fix for
Bug 41932 funcs_1: is_collation_character_set_applicability path
too long for tar
which was missing in 5.0 (just a renaming of two files)
Fix for when memory pre-allocation fails.
mysys/my_alloc.c:
Added code to null-out the pre-alloc pointer if allocation fails. This is necessary for the next time this procedure is called.
mysql-test/r/variables-big.result:
Added "big" test for bug fix Bug #27322.
mysql-test/t/variables-big.test:
Added "big" test for bug fix Bug #27322.
