Move headers from server/include to include/maxscale

- Headers now to be included as <maxscale/xyz.h>
- First step, no cleanup of headers has been made. Only moving
  from one place to another + necessary modifications.

server/modules/routing/debugcli/debugcmd.c

@@ -51,29 +51,29 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
-#include <service.h>
-#include <session.h>
-#include <router.h>
-#include <filter.h>
-#include <modules.h>
-#include <atomic.h>
-#include <server.h>
-#include <spinlock.h>
-#include <buffer.h>
-#include <dcb.h>
+#include <maxscale/service.h>
+#include <maxscale/session.h>
+#include <maxscale/router.h>
+#include <maxscale/filter.h>
+#include <maxscale/modules.h>
+#include <maxscale/atomic.h>
+#include <maxscale/server.h>
+#include <maxscale/spinlock.h>
+#include <maxscale/buffer.h>
+#include <maxscale/dcb.h>
 #include <maxscale/poll.h>
-#include <users.h>
-#include <dbusers.h>
-#include <maxconfig.h>
+#include <maxscale/users.h>
+#include <maxscale/dbusers.h>
+#include <maxscale/maxconfig.h>
 #include <telnetd.h>
-#include <adminusers.h>
-#include <monitor.h>
+#include <maxscale/adminusers.h>
+#include <maxscale/monitor.h>
 #include <debugcli.h>
-#include <housekeeper.h>
-#include <listmanager.h>
+#include <maxscale/housekeeper.h>
+#include <maxscale/listmanager.h>
 
-#include <skygw_utils.h>
-#include <log_manager.h>
+#include <maxscale/skygw_utils.h>
+#include <maxscale/log_manager.h>
 #include <sys/syslog.h>
 
 #define MAXARGS 6