When walking the cache, if we skip a cred because it's a config entry,
make sure to free it.  Also free the result of krb5_cc_get_principal.
Based on a patch from Nalin Dahyabhai.

Provide default values in pre.in for PROG_LIBPATH, PROG_RPATH,
SHLIB_DIRS, SHLIB_RDIRS, and STOBJLISTS so that they don't have to be
specified in the common case.  Rename KRB5_RUN_ENV and KRB5_RUN_VARS
to RUN_SETUP (already the most commonly used name) and RUN_VARS.  Make
sure to use DEFINES for local defines (not DEFS).  Remove some other
unnecessary makefile content.

Mostly this gets rid of the trailing space on line 2 after
bb76891f5386526bdf91bc790c614fc9296cb5fa.

Since there is no overlap between the clpreauth and kdcpreauth
interface declarations, there's no particular reason to combine them
into one header.  For backward compatibility and convenience, leave
behind a preauth_plugin.h which includes both.

The old man pages are gone, so we can't install them anymore.
Also clean up install and install-unix targets that were installing
the old man pages by hand.

We generate man pages from RST sources now; they are checked into
the tree in src/man/.

The gen-manpages directory is no longer needed.

In combination with -k, -i will cause kinit or klist to use the
default client keytab instead of the default acceptor keytab.  This
gives an easy way to figure out what default client keytab name is in
use and to get credentials using it.

ticket: 7216 (new)

Previously, if configure did not detect dgettext(), we disabled
anything that smelled like localization, inadvertently including
setlocale().  Now that we use setlocale(LC_ALL, ""), we have
localized dates available as well as messages, so we should not
disable calls to setlocale() any more.
Since the routines from locale.h are only used in a relatively
small number of places, just include the header directly in those
files and remove it from k5-platform.h.