net: function to identify ipv6 addresses in URLs

src/net.c

@@ -345,6 +345,11 @@ bool git_net_url_is_default_port(git_net_url *url)
 		return false;
 }
 
+bool git_net_url_is_ipv6(git_net_url *url)
+{
+	return (strchr(url->host, ':') != NULL);
+}
+
 void git_net_url_swap(git_net_url *a, git_net_url *b)
 {
 	git_net_url tmp = GIT_NET_URL_INIT;

src/net.h

@@ -36,6 +36,9 @@ extern bool git_net_url_valid(git_net_url *url);
 /** Returns true if the URL is on the default port. */
 extern bool git_net_url_is_default_port(git_net_url *url);
 
+/** Returns true if the host portion of the URL is an ipv6 address. */
+extern bool git_net_url_is_ipv6(git_net_url *url);
+
 /* Applies a redirect to the URL with a git-aware service suffix. */
 extern int git_net_url_apply_redirect(
 	git_net_url *url,