prof_tree.c: Add new functions profile_get_node_name,

prof_tree.c: Add new functions profile_get_node_name,
	profile_get_node_value, profile_find_node, profile_remove_node,
	profile_set_relation_value, profile_rename_node.  Rewrite
	profile_find_node_relation and profile_find_node_subsection in terms
	of profile_find_node.

prof_set.c, Makefile.in: Add a new file which exports the public
	interfaces for setting profile entries.

prof_get.c, prof_init.c, prof_int.h: Add the KRB5_DLLIMP and
	KRB5_CALLCONV to all of the various profile routines so they can be
	properly exported via a Windows DLL.

prof_int.h: Add definition for the flags in the profile structure.

prof_err.et: Add new error codes PROF_SET_SECTION_VALUE, PROF_EINVAL,
	PROF_READ_ONLY, and PROF_EXISTS.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@11236 dc483132-0cff-0310-8789-dd5450dbe970