[master] 872f5a9 Add a backslash to fix the latex build

[Per Buer]

commit 872f5a96b28ec4f7bdb2890de02b639d0d7ad6f6
Author: Per Buer <perbu at varnish-software.com>
Date:   Fri Jan 16 11:35:15 2015 +0100

    Add a backslash to fix the latex build

diff --git a/doc/sphinx/users-guide/operation-logging.rst b/doc/sphinx/users-guide/operation-logging.rst
index 4dfa40f..22b9e4c 100644
--- a/doc/sphinx/users-guide/operation-logging.rst
+++ b/doc/sphinx/users-guide/operation-logging.rst
@@ -67,7 +67,7 @@ want to know are:
 '-c'
  Same as '-b' but for client side traffic.
 
-'-m tag:regex'
+'-m tag\:regex'
  Only list transactions where the tag matches a regular expression. If
  it matches you will get the whole transaction.