util.auxiliary: add html_escape().
mod_muc_log_http: attempt splitting out log generation outside the main Metronome process. (Fixes #60)
mod_muc_log_http: fix redundant code in the generation script.
mod_muc_log_http: also set cpath in the generation script.
mod_muc_log_http: cleanup after the page is obtained.
mod_muc_log_http: fix syntax error.