Add websocket support to Apache vhost template

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

support/apache/mobilizon.conf

@@ -69,7 +69,10 @@
     #FileETag None
     #TraceEnable off
     <Location />
+        ProxyPass ws://${mob_url}:${mob_port}/
+        ProxyPassReverse ws://${mob_url}:${mob_port}/
         ProxyPass http://${mob_url}:${mob_port}/
+        ProxyPassReverse http://${mob_url}:${mob_port}/
     </Location>
     <FilesMatch ^/(js|css)$>
         Header append Cache-Control "public, max-age=31536000, immutable"