* krb5-config.in: New script for providing linker and compiler

	* krb5-config.in: New script for providing linker and compiler
	information for applications.

	* patchlevel.h: Update to current release. Mkrel script generates
	this in distribtions.

	* configure.in: Add support for parsing patchlevel.h into a
	useable form for krb5-config. Generate krb5-config from
	krb5-config.in. Add KRB5_BUILD_PROGRAM for variable substitution.

	* Makefile.in: Add support for building and installing krb5-config.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@13249 dc483132-0cff-0310-8789-dd5450dbe970