dbclient: handle -- per IEEE Std 1003.1 XBD 12.2

Author: edcsnt

src/cli-runopts.c

@@ -220,6 +220,11 @@ void cli_getopts(int argc, char ** argv) {
 			break;
 		}
 
+		if (argv[i][1] == '-' && argv[i][2] == '\0') {
+			++i;
+			break;
+		}
+
 		/* Begins with '-' */
 		opt = OPT_OTHER;
 		for (j = 1; (c = argv[i][j]) != '\0' && !next && opt == OPT_OTHER; j++) {