Router: fixed crash when matching an empty address pattern array.

A crash would occur when the router tried to match an
against an empty address pattern array.

The following configuration was used to reproduce the
issue:

{
    "listeners": {
        "127.0.0.1:8082": {
            "pass": "routes"
        }
    },
    "routes": [
        {
            "match": {
                "source": []
            },
            "action": {
                "return": 200
            }
        }
    ]
}

1 files changed, 7 insertions, 0 deletions

diff --git a/docs/changes.xml b/docs/changes.xml
index 63c52633..e183f907 100644
--- a/docs/changes.xml
+++ b/docs/changes.xml
@@ -99,6 +99,13 @@ or "upstreams" using a variable "pass" option.
 </para>
 </change>
 
+<change type="bugfix">
+<para>
+the router process crashed while matching a request to an empty array of
+source or destination address patterns.
+</para>
+</change>
+
 </changes>