* configure.in: bail if krb5.h, pam_appl.h, or pam_modules.h aren't found.
    	Check for et/com_err.h if com_err.h isn't found.
    	Check for the existence of the internal timeout variables in libkrb5,
    	which we shouldn't be touching (note: these bits are going to go away).
    	Check for declarations of the krb5_os_hostaddr, krb5_os_localaddr, and
    	krb5_copy_addr functions, because they may be internal to krb5
    	depending on the version.
    * pam_krb5afs.c(get_config): wrap access to internal timeout variables in
    	#ifdef blocks.
    * pam_krb5afs.c(pam_sm_chauthtok): just error out if krb5_change_password
    	wasn't found at compile-time.
    * pam_krb5afs.c(validate_tgt): Don't compile in if we found
    	krb5_verify_init_creds at compile-time.
    * krb5conf.y: fix declarations for various functions to quiet compiler warnings.
    * autogen: use autoreconf.
    * configure.in, Makefile.in: set up for running tests.
    * tests: pull up from HEAD.
    * pam_krb5.spec: bump to version 1.70