ADMIN: reload: introduce -vv mode

The -v verbose mode displays the loading messages returned by the master
CLI reload command upon error.

The new -vv mode displays the loading messages even upon success,
showing the content of `show startup-logs` after the reload attempt.

admin/cli/haproxy-reload

@@ -28,6 +28,8 @@ reload() {
 		else
 			if [ "$RET" = 1 ] && [ "$VERBOSE" = "2" ]; then
 				echo "$line" >&2
+			elif [ "$VERBOSE" = "3" ]; then
+				echo "$line" >&2
 			fi
 		fi
 
@@ -54,7 +56,8 @@ usage() {
 	echo "  -d,  --debug                  Debug mode, set -x"
 	echo "  -t,  --timeout                Timeout (socat -t) (default: ${TIMEOUT})"
 	echo "  -s,  --silent                 Slient mode (no output)"
-	echo "  -v, --verbose                Verbose mode (output from haproxy)"
+	echo "  -v,  --verbose                Verbose output (output from haproxy on failure)"
+	echo "  -vv                           Even more verbose output (output from haproxy on success and failure)"
 	echo "  -h,  --help                   This help"
 	echo ""
 	echo "Examples:"
@@ -81,6 +84,10 @@ main() {
 				VERBOSE=2
 				shift
 				;;
+			-vv|--verbose)
+				VERBOSE=3
+				shift
+				;;
 			-d|--debug)
 				DEBUG=1
 				shift