Update apache tls proxy logs

This creates log files per proxy vhost and sets the log level to info to
help debug potential issues with tls proxying.

Change-Id: I02a62224662b021b35c293909ba045b4b74e1df8
diff --git a/lib/tls b/lib/tls
index c78ea5b..6697dc8 100644
--- a/lib/tls
+++ b/lib/tls
@@ -476,6 +476,11 @@
         ProxyPass http://$b_host:$b_port/ retry=5 nocanon
         ProxyPassReverse http://$b_host:$b_port/
     </Location>
+    ErrorLog $APACHE_LOG_DIR/tls-proxy_error.log
+    ErrorLogFormat "[%{u}t] [%-m:%l] [pid %P:tid %T] %7F: %E: [client\ %a] [frontend\ %A] %M% ,\ referer\ %{Referer}i"
+    LogLevel info
+    CustomLog $APACHE_LOG_DIR/tls-proxy_access.log common
+    LogFormat "%v %h %l %u %t \"%r\" %>s %b"
 </VirtualHost>
 EOF
     for mod in ssl proxy proxy_http; do