Remove some unnecessary includes and fix a typo.

cfg.c

@@ -17,7 +17,6 @@
  */
 
 #include <sys/types.h>
-#include <sys/stat.h>
 
 #include <ctype.h>
 #include <errno.h>

client.c

@@ -25,8 +25,6 @@
 
 #include <errno.h>
 #include <event.h>
-#include <fcntl.h>
-#include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

cmd-lock-server.c

@@ -18,10 +18,6 @@
 
 #include <sys/types.h>
 
-#include <pwd.h>
-#include <string.h>
-#include <unistd.h>
-
 #include "tmux.h"
 
 /*

cmd-new-session.c

@@ -20,7 +20,6 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <termios.h>

options-table.c

@@ -28,8 +28,8 @@
  * options. These tables are the master copy of the options with their real
  * (user-visible) types, range limits and default values. At start these are
  * copied into the runtime global options trees (which only has number and
- * string types). These tables are then used to loop up the real type when
- * the user sets an option or its value needs to be shown.
+ * string types). These tables are then used to look up the real type when the
+ * user sets an option or its value needs to be shown.
  */
 
 /* Choice option type lists. */

window.c

@@ -17,14 +17,10 @@
  */
 
 #include <sys/types.h>
-#include <sys/ioctl.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <fnmatch.h>
-#include <paths.h>
-#include <pwd.h>
-#include <signal.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>