[interchange] Add SISTRIX optimizer to robot user agents (https://www.sistrix.com/faq/uptime).

[Stefan Hornburg]

commit df6a80eba3bb956cab6fd013cb1270f8d9ebd320
Author: Stefan Hornburg (Racke) <racke at linuxia.de>
Date:   Tue Jun 21 09:19:59 2016 +0200

    Add SISTRIX optimizer to robot user agents (https://www.sistrix.com/faq/uptime).

 dist/robots.cfg |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/dist/robots.cfg b/dist/robots.cfg
index 191e3d7..42f7563 100644
--- a/dist/robots.cfg
+++ b/dist/robots.cfg
@@ -123,6 +123,7 @@ RobotUA <<EOR
     shelob,
     ShopWiki,
     silk,
+    Sistrix,
     Slurp,
     sna,
     Snappy,