libfetch: implement default port for HTTPS.

If getservbyname() fails, libfetch will attempt to connect to port 0.

libfetch/common.c

@@ -184,6 +184,8 @@ fetch_default_port(const char *scheme)
 		return (FTP_DEFAULT_PORT);
 	if (strcasecmp(scheme, SCHEME_HTTP) == 0)
 		return (HTTP_DEFAULT_PORT);
+	if (strcasecmp(scheme, SCHEME_HTTPS) == 0)
+		return (HTTPS_DEFAULT_PORT);
 	return (0);
 }
 

libfetch/common.h

@@ -34,6 +34,7 @@
 
 #define FTP_DEFAULT_PORT	21
 #define HTTP_DEFAULT_PORT	80
+#define HTTPS_DEFAULT_PORT	443
 #define FTP_DEFAULT_PROXY_PORT	21
 #define HTTP_DEFAULT_PROXY_PORT	3128