fix: OpenLDAP can't use TLS after a fork()

Resolves: #636956
Upstream ITS: #6862
Author: Rich Megginson <rmeggins@redhat.com>

--- openldap-2.4.24.orig/libraries/libldap/tls_m.c
+++ openldap-2.4.24/libraries/libldap/tls_m.c
@@ -2890,7 +2890,9 @@
 	 * context in the child.
 	 */
 	if ( !nofork ) {
-		PR_SetEnv( "NSS_STRICT_NOFORK=DISABLED" );
+		/* will leak one time */
+		char *noforkenvvar = PL_strdup( "NSS_STRICT_NOFORK=DISABLED" );
+		PR_SetEnv( noforkenvvar );
 	}
 
 	return 0;