patch 8.0.1426: "gf" and <cfile> don't accept ? and & in URL

Problem:    "gf" and <cfile> don't accept ? and & in URL. (Dmitrii Tcyganok)
Solution:   Check for a URL and allow for extra characters. (closes #2493)
diff --git a/src/version.c b/src/version.c
index f62287b..1754722 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1426,
+/**/
     1425,
 /**/
     1424,