Fix the logic bug that caused the custom versions of warn(3) and

warnx(3) to be compiled on systems that have it (e.g. FreeBSD),
while the intention was opposite, i.e., compile them on systems
that don't have them.  Also fixes static linkage of pkg_sign(1).

usr.sbin/pkg_install/sign/main.c

@@ -106,9 +106,9 @@ main(argc, argv, envp)
 	int i;
 	int type = TAG_ANY;
 
-/* #ifndef BSD4_4 */
+#ifndef BSD4_4
 	set_program_name(argv[0]);
-/* #endif */
+#endif
 #ifdef CHECKER_ONLY
 	mode = CHECK;
 #else

usr.sbin/pkg_install/sign/stand.c

@@ -3,7 +3,7 @@ __FBSDID("$FreeBSD$");
 
 #include "stand.h"
 
-#ifdef BSD4_4
+#ifndef BSD4_4
 #include <string.h>
 #include <stdio.h>
 #include <errno.h>