Check for flock in libbsd for AIX, and remove some getopt.h includes. From J

Raynor.

arguments.c

@@ -18,7 +18,6 @@
 
 #include <sys/types.h>
 
-#include <getopt.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

configure.ac

@@ -96,6 +96,9 @@ AC_CHECK_HEADERS(
 	]
 )
 
+# Look for library needed for flock.
+AC_SEARCH_LIBS(flock, bsd)
+
 # Check for some functions that are replaced or omitted.
 AC_CHECK_FUNCS(
 	[ \

tmux.c

@@ -22,7 +22,6 @@
 #include <errno.h>
 #include <event.h>
 #include <fcntl.h>
-#include <getopt.h>
 #include <locale.h>
 #include <pwd.h>
 #include <stdlib.h>