Include strings.h which is needed for strcasemp. Some systems declare them

in string.h, but it should be possible to include both.

clients/lcdexec/lcdexec.c

@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
+#include <strings.h>
 #include <errno.h>
 #include <sys/utsname.h>
 #include <signal.h>

clients/lcdexec/menu.c

@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
+#include <strings.h>
 
 #include "shared/str.h"
 #include "shared/report.h"

clients/lcdproc/iface.c

@@ -27,6 +27,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <time.h>
 
 #include "shared/sockets.h"

clients/lcdproc/main.c

@@ -1,9 +1,8 @@
-#include "getopt.h"
-
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <fcntl.h>
 #include <termios.h>
 #include <errno.h>
@@ -25,6 +24,7 @@
 #include "shared/debug.h"
 #include "shared/report.h"
 #include "shared/configfile.h"
+#include "getopt.h"
 
 #include "batt.h"
 #include "chrono.h"