Get errno from <errno.h>, not from extern int.

Add $FreeBSD$ to hopefully the right place.

lib/libss/help.c

@@ -1,3 +1,5 @@
+/* $FreeBSD$ */
+
 /*
  * Copyright 1987, 1988 by MIT Student Information Processing Board
  *
@@ -8,13 +10,12 @@
 #include <sys/file.h>
 #include <sys/wait.h>
 #include <dirent.h>
+#include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include "ss_internal.h"
 #include "copyright.h"
 
-extern int errno;
-
 void ss_help (argc, argv, sci_idx, info_ptr)
     int argc;
     char const * const *argv;

lib/libss/pager.c

@@ -1,3 +1,5 @@
+/* $FreeBSD$ */
+
 /*
  * Pager: Routines to create a "more" running out of a particular file
  * descriptor.
@@ -9,6 +11,7 @@
 
 #include "ss_internal.h"
 #include "copyright.h"
+#include <errno.h>
 #include <stdio.h>
 #include <sys/file.h>
 #include <signal.h>
@@ -17,7 +20,6 @@
 static char MORE[] = "more";
 extern char *_ss_pager_name;
 extern char *getenv();
-extern int errno;
 
 /*
  * this needs a *lot* of work....