Enable -l for log option

shell/main.cpp

@@ -213,7 +213,7 @@ space at ROM and ROM_P2.
 Options:
   -e, --execute=CMD    execute CMD and exit, can be used multiple times
       --norc           do not execute any fxosrc files
-      --log=LEVEL      set log level (debug, warning, error; default warning)
+  -l, --log=LEVEL      set log level (debug, warning, error; default warning)
   -h, --help           display this help and exit
 )";
 
@@ -233,7 +233,7 @@ static void parse_options(int argc, char **argv) {
 	int opt, option_index;
 	while (1) {
 		/* Get the next command-line option */
-		opt = getopt_long(argc, argv, "he:", long_options, &option_index);
+		opt = getopt_long(argc, argv, "he:l:", long_options, &option_index);
 
 		if (opt == -1)
 			break;