Solved
Dispatcher does not pass mod_rewrite logging included via disp_apache2.c
I was unable to turn logging on for mod_rewrite.
I tried setting "LogLevel warn rewrite:info" in my_publish.vhost (see core - Apache HTTP Server Version 2.5 ), but my own rewrites would not get logged. On the other hand, default rewrite rules started getting logged with this setting.
Any suggestions?
Thanks,
Leo