[master] 3e10a62 Add a --optstring long options to VUTs

[Dridi Boukelmoune]

commit 3e10a62331ff854715f664c18ca1901205df3915
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Sep 26 14:59:09 2017 +0200

    Add a --optstring long options to VUTs
    
    This is similar to `varnishd -x optstring`.
    
    Refs dc5fe3b

diff --git a/lib/libvarnishapi/vut.c b/lib/libvarnishapi/vut.c
index 1438195..61b5a2f 100644
--- a/lib/libvarnishapi/vut.c
+++ b/lib/libvarnishapi/vut.c
@@ -212,6 +212,10 @@ VUT_Init(const char *progname, int argc, char * const *argv,
 		exit(vut_synopsis(voc));
 	if (argc == 2 && !strcmp(argv[1], "--options"))
 		exit(vut_options(voc));
+	if (argc == 2 && !strcmp(argv[1], "--optstring")) {
+		(void)printf("%s\n", voc->vopt_optstring);
+		exit(0);
+	}
 
 	vut->progname = progname;
 	vut->g_arg = VSL_g_vxid;