dirmngr: Only report hkps scheme when available

* dirmngr/ks-engine-hkp.c (ks_hkp_help): Make use of TLS macros.

--
Only report support for the hkps scheme when GnuPG / dirmngr
has been built with a TLS library.

This helps debuging and enable the user to detect whether support
for hkps is included by doing a
`gpg-connect-agent --dirmngr 'keyserver --help' /bye`.
Currently hkps will be listed as a supported scheme but trying to
add a keyserver using it will silently fail.

As a digression, https is never listed as a valid scheme.

1 files changed, 9 insertions, 1 deletions

diff --git a/dirmngr/ks-engine-hkp.c b/dirmngr/ks-engine-hkp.c
index 12b1778c6..83e878ad7 100644
--- a/dirmngr/ks-engine-hkp.c
+++ b/dirmngr/ks-engine-hkp.c
@@ -767,12 +767,20 @@ ks_hkp_help (ctrl_t ctrl, parsed_uri_t uri)
   const char const data[] =
     "Handler for HKP URLs:\n"
     "  hkp://\n"
+#if  HTTP_USE_GNUTLS || HTTP_USE_NTBTLS
     "  hkps://\n"
+#endif
     "Supported methods: search, get, put\n";
   gpg_error_t err;
 
+#if  HTTP_USE_GNUTLS || HTTP_USE_NTBTLS
+  const char data2[] = "  hkp\n  hkps";
+#else
+  const char data2[] = "  hkp";
+#endif
+
   if (!uri)
-    err = ks_print_help (ctrl, "  hkp\n  hkps");
+    err = ks_print_help (ctrl, data2);
   else if (uri->is_http && (!strcmp (uri->scheme, "hkp")
                             || !strcmp (uri->scheme, "hkps")))
     err = ks_print_help (ctrl, data);