Fix gssapi/kerberos dependencies in configure (RT #23836)

CHANGES

@@ -1,3 +1,5 @@
+3093.	[bug]		Fix gssapi/kerberos dependencies [RT #23836]
+
 3092.	[bug]		Signatures for records at the zone apex could go
 			stale due to an incorrect timer setting. [RT #23769]
 

configure.in

@@ -18,7 +18,7 @@ AC_DIVERT_PUSH(1)dnl
 esyscmd([sed "s/^/# /" COPYRIGHT])dnl
 AC_DIVERT_POP()dnl
 
-AC_REVISION($Revision: 1.520 $)
+AC_REVISION($Revision: 1.521 $)
 
 AC_INIT(lib/dns/name.c)
 AC_PREREQ(2.59)
@@ -800,16 +800,24 @@ AC_ARG_WITH(gssapi,
 [  --with-gssapi=PATH      Specify path for system-supplied GSSAPI [[default=yes]]],
     use_gssapi="$withval", use_gssapi="yes")
 
-gssapidirs="/usr/local /usr/pkg /usr/kerberos /usr"
+# gssapi is just the framework, we really require kerberos v5, so
+# look for those headers (the gssapi headers must be there, too)
+# The problem with this implementation is that it doesn't allow
+# for the specification of gssapi and krb5 headers in different locations
+# This probably ought to be fixed.
+krb5dirs="/usr/local /usr/local/krb5 /usr/local/kerberosv5 /usr/local/kerberos /usr/pkg /usr/krb5 /usr/kerberosv5 /usr/kerberos /usr"
 if test "$use_gssapi" = "yes"
 then
-	for d in $gssapidirs
+	for d in $krb5dirs
 	do
+		if test -f $d/include/gssapi/gssapi_krb5.h -o -f $d/include/krb5.h
+		then
 			if test -f $d/include/gssapi/gssapi.h -o -f $d/include/gssapi.h
 			then
 				use_gssapi=$d
 				break
 			fi
+		fi
 		use_gssapi="no"
 	done
 fi