adm_network.c (setup_network): Use sigaction() instead of

adm_network.c (setup_network): Use sigaction() instead of
	signal() to setup the signal handlers.  This means we
	don't need to worry about System V signal semantics.

adm_server.c (kdc_com_err_proc): Free nfmt after done using it.

Makefile.in (kadmind): Use $(LD) instead of $(CC) so that we can
	do purify checking.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5652 dc483132-0cff-0310-8789-dd5450dbe970