[gimp-web/testing] Add syringanetworks mirrors

[Michael Schumacher <schumaml src gnome org>]

commit d29099f85df8474d04a8e9213d8ad7611be3b221
Author: nmat <15926-nmat users noreply gitlab gnome org>
Date:   Wed Jun 12 22:56:34 2019 +0200

    Add syringanetworks mirrors
    
    * Fix #67

 content/downloads/mirrors2.json | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/content/downloads/mirrors2.json b/content/downloads/mirrors2.json
index f35d72e1..203d8938 100644
--- a/content/downloads/mirrors2.json
+++ b/content/downloads/mirrors2.json
@@ -86,5 +86,11 @@
       "http://ftp.iut-bm.univ-fcomte.fr/gimp/";,
       "ftp://ftp.iut-bm.univ-fcomte.fr/gimp/";,
       "rsync://ftp.iut-bm.univ-fcomte.fr/gimp/"
+    ],
+    "mirrors.syringanetworks.net" : [
+      "https://mirrors.syringanetworks.net/gimp/";,
+      "http://mirrors.syringanetworks.net/gimp/";,
+      "ftp://mirrors.syringanetworks.net/gimp/";,
+      "rsync://mirrors.syringanetworks.net/gimp/"
     ]
 }