Add gemini protocol supportHEADmaster

The gemini protocol's "speculative specification" is documented  at the
following URLs:

  https://gemini.circumlunar.space/docs/spec-spec.txt
  gopher://gemini.circumlunar.space/1/docs/spec-spec.txt
  gemini://gemini.circumlunar.space/docs/spec-spec.txt

This patch introduces preliminary support for version 0.11.0 of the
specification, as of March 1st 2020.

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/url.c b/lib/url.c
index 4021c5d78..cc5c282ad 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -113,6 +113,7 @@ bool curl_win32_idn_to_ascii(const char *in, char **out);
 #include "inet_ntop.h"
 #include "http_ntlm.h"
 #include "curl_rtmp.h"
+#include "gemini.h"
 #include "gopher.h"
 #include "mqtt.h"
 #include "http_proxy.h"
@@ -145,7 +146,7 @@ static unsigned int get_protocol_family(unsigned int protocol);
  * Protocol table. Schemes (roughly) in 2019 popularity order:
  *
  * HTTPS, HTTP, FTP, FTPS, SFTP, FILE, SCP, SMTP, LDAP, IMAPS, TELNET, IMAP,
- * LDAPS, SMTPS, TFTP, SMB, POP3, GOPHER POP3S, RTSP, RTMP, SMBS, DICT
+ * LDAPS, SMTPS, TFTP, SMB, POP3, GOPHER POP3S, RTSP, RTMP, SMBS, DICT, GEMINI
  */
 static const struct Curl_handler * const protocols[] = {
 
@@ -249,6 +250,10 @@ static const struct Curl_handler * const protocols[] = {
   &Curl_handler_dict,
 #endif
 
+#ifndef CURL_DISABLE_GEMINI
+  &Curl_handler_gemini,
+#endif
+
   (struct Curl_handler *) NULL
 };
 
@@ -4107,6 +4112,10 @@ static unsigned int get_protocol_family(unsigned int protocol)
     family = CURLPROTO_GOPHER;
     break;
 
+  case CURLPROTO_GEMINI:
+    family = CURLPROTO_GEMINI;
+    break;
+
   case CURLPROTO_SMB:
   case CURLPROTO_SMBS:
     family = CURLPROTO_SMB;