Move unistd.h includes to individual .c files and remove unnecessary

includes.

usr.bin/talk/ctl_transact.c

@@ -42,7 +42,6 @@ static const char sccsid[] = "@(#)ctl_transact.c	8.1 (Berkeley) 6/6/93";
 #include <arpa/inet.h>
 
 #include <errno.h>
-#include <string.h>
 
 #include "talk.h"
 #include "talk_ctl.h"

usr.bin/talk/display.c

@@ -44,6 +44,7 @@ static const char sccsid[] = "@(#)display.c	8.1 (Berkeley) 6/6/93";
  * displaying of text
  */
 #include <ctype.h>
+#include <unistd.h>
 
 #include "talk.h"
 

usr.bin/talk/get_addrs.c

@@ -42,6 +42,7 @@ static const char sccsid[] = "@(#)get_addrs.c	8.1 (Berkeley) 6/6/93";
 #include <err.h>
 #include <netdb.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "talk.h"
 #include "talk_ctl.h"

usr.bin/talk/get_iface.c

@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
 
 #include <errno.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "talk.h"
 

usr.bin/talk/get_names.c

@@ -45,6 +45,7 @@ static const char sccsid[] = "@(#)get_names.c	8.1 (Berkeley) 6/6/93";
 #include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "talk.h"
 

usr.bin/talk/invite.c

@@ -47,6 +47,7 @@ static const char sccsid[] = "@(#)invite.c	8.1 (Berkeley) 6/6/93";
 #include <errno.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <unistd.h>
 
 #include "talk_ctl.h"
 #include "talk.h"

usr.bin/talk/look_up.c

@@ -45,6 +45,7 @@ static const char sccsid[] = "@(#)look_up.c	8.1 (Berkeley) 6/6/93";
 
 #include <errno.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "talk_ctl.h"
 #include "talk.h"

usr.bin/talk/talk.c

@@ -46,6 +46,7 @@ static const char copyright[] =
 #endif
 
 #include <locale.h>
+#include <unistd.h>
 
 #include "talk.h"
 

usr.bin/talk/talk.h

@@ -42,7 +42,6 @@
 #include <arpa/inet.h>
 #include <protocols/talkd.h>
 #include <curses.h>
-#include <unistd.h>
 
 extern	int sockt;
 extern	int curses_initialized;