test_profile.c: Added ability to test profile set functions, and in a

test_profile.c: Added ability to test profile set functions, and in a
	batch mode.

prof_init.c (profile_flush): Add new public function for flushing
	changes made to the profile.

prof_parse.c (profile_write_tree_file): Add official internal function
	for flushing out a profile tree to a FILE *.

configure.in, prof_file.c (rw_access): Add new function which checks
	to see whether we have read/write access, and emulate this for losing
	non-POSIX OS's.

prof_file.c (profile_flush_file): Add support for writing modified
	profile file's.  Call profile_flush_file from profile_close_file().

Also fixed minor bugs in prof_tree.c which affected renaming sections and
modifying existing relations.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@11237 dc483132-0cff-0310-8789-dd5450dbe970