Patch: Add URL config option

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Hi everyone, I wanted to contribute with the following patch:

############################################
commit 52e665b7bf8e8f08d78a36e84ff67c0ef5183ee1
Author: Dmitrii Sutiagin <f3flight at gmail.com>
Date:   Thu May 18 12:49:40 2017 -0700

    Add URL config option

    This new option allows putting <server> argument into a config file,
    which in turn allows cleaner setups of systemd units / automation.
    If --url is used then <server> argument can be omitted.
    If both --url and <server> are specified then <server> is used.

    Signed-off-by: Dmitrii Sutiagin <f3flight at gmail.com>

diff --git a/main.c b/main.c
index 7869f72..eab4f41 100644
--- a/main.c
+++ b/main.c
@@ -188,6 +188,7 @@ enum {
  OPT_LOCAL_HOSTNAME,
  OPT_PROTOCOL,
  OPT_PASSTOS,
+ OPT_URL,
 };

 #ifdef __sun__
@@ -269,6 +270,7 @@ static const struct option long_options[] = {
  OPTION("dump-http-traffic", 0, OPT_DUMP_HTTP),
  OPTION("no-system-trust", 0, OPT_NO_SYSTEM_TRUST),
  OPTION("protocol", 1, OPT_PROTOCOL),
+ OPTION("url", 1, OPT_URL),
 #ifdef OPENCONNECT_GNUTLS
  OPTION("gnutls-debug", 1, OPT_GNUTLS_DEBUG),
 #endif
@@ -867,6 +869,7 @@ static void usage(void)
  printf("      --resolve=HOST:IP           %s\n", _("Use IP when
connecting to HOST"));
  printf("      --os=STRING                 %s\n", _("OS type
(linux,linux-64,win,...) to report"));
  printf("      --dtls-local-port=PORT      %s\n", _("Set local port
for DTLS datagrams"));
+ printf("      --url=URL                   %s\n", _("Set URL to
connect to. If set, <server> argument can be omitted"));
  print_supported_protocols_usage();

  printf("\n");
@@ -1068,6 +1071,7 @@ int main(int argc, char **argv)
  oc_token_mode_t token_mode = OC_TOKEN_MODE_NONE;
  int reconnect_timeout = 300;
  int ret;
+ char *url = NULL;
 #ifdef HAVE_NL_LANGINFO
  char *charset;
 #endif
@@ -1431,6 +1435,9 @@ int main(int argc, char **argv)
  case OPT_TIMESTAMP:
  timestamp = 1;
  break;
+ case OPT_URL:
+ url = keep_config_arg();
+ break;
 #ifdef OPENCONNECT_GNUTLS
  case OPT_GNUTLS_DEBUG:
  gnutls_global_set_log_level(atoi(config_arg));
@@ -1448,9 +1455,12 @@ int main(int argc, char **argv)
  if (optind < argc - 1) {
  fprintf(stderr, _("Too many arguments on command line\n"));
  usage();
- } else if (optind > argc - 1) {
- fprintf(stderr, _("No server specified\n"));
- usage();
+ } else if (optind == argc - 1) {
+ url = strdup(argv[optind]);
+ }
+ if (!(url && strlen(url))) {
+ fprintf(stderr, _("No URL or server specified\n"));
+ usage();
  }

  if (!vpninfo->sslkey)
@@ -1501,16 +1511,12 @@ int main(int argc, char **argv)
  if (vpninfo->sslkey && do_passphrase_from_fsid)
  openconnect_passphrase_from_fsid(vpninfo);

- if (config_lookup_host(vpninfo, argv[optind]))
+ if (config_lookup_host(vpninfo, url))
  exit(1);

  if (!vpninfo->hostname) {
- char *url = strdup(argv[optind]);
-
  if (openconnect_parse_url(vpninfo, url))
  exit(1);
-
- free(url);
  }

  /* Historically, the path in the URL superseded the one in the
############################################



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