Windows: Disambiguate DOS style paths from SSH URLs.

If on Windows a path is specified as C:/path, then this is also a valid
SSH URL. To disambiguate between the two interpretations we take an URL
that looks like a path with a drive letter as a local URL.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>

connect.c

@@ -529,7 +529,7 @@ struct child_process *git_connect(int fd[2], const char *url_orig,
 		end = host;
 
 	path = strchr(end, c);
-	if (path) {
+	if (path && !has_dos_drive_prefix(end)) {
 		if (c == ':') {
 			protocol = PROTO_SSH;
 			*path++ = '\0';

transport.c

@@ -709,7 +709,8 @@ static int is_local(const char *url)
 {
 	const char *colon = strchr(url, ':');
 	const char *slash = strchr(url, '/');
-	return !colon || (slash && slash < colon);
+	return !colon || (slash && slash < colon) ||
+		has_dos_drive_prefix(url);
 }
 
 static int is_file(const char *url)