The process of installing acs-authentication's service contract implementations ends up trying to reload /packages/acs-service-contract/tcl/acs-service-contract-init.tcl, for which there is no entry on the apm_library_mtime nsv_array, therefore this logging message aboarts the installation.
- don't use regexp when not needed (match is so much faster). - provide context info for naviserver writer threads - reset "extra_url", needed for internal redirects on errors.