kamctl: srv modules subcommand

- list the loaded modules

utils/kamctl/kamctl

@@ -1799,6 +1799,11 @@ ksr_srv() {
 				ctl_cmd_run corex.debug $2
 			fi
 			;;
+		modules)
+			require_ctlengine
+			mecho "list loaded modules"
+			ctl_cmd_run core.modules
+			;;
 		version)
 			require_ctlengine
 			mecho "list server version"

utils/kamctl/kamctl.base

@@ -556,6 +556,7 @@ cat <<EOF
  srv aliases ................... show the list of server aliases
  srv rpclist ................... show the list of server rpc commands
  srv debug [<level>] ........... control the server debug level
+ srv modules ................... show the list of loaded modules
  srv version ................... show the server version
 EOF
 }