Log Message:
update to 0.66

This version is a response to the "clamav 0.65 remote DOS exploit"
information published on popular security-related mailing lists.

Other changes include: (see the README for a full list)

-) clamd:
    + fixed database timestamp handling (and a double reload problem reported
      by Alex Pleiner and Ole Stanstrup)
    + new directive: ArchiveMaxCompressionRatio
    + new command: SESSION (starts a clamd session and allows to do multiple
      commands per TCP session)
    + new directives: TemporaryDirectory, LogClean (Andrey V. Malyshev)

-) freshclam:
    + support for freshclam.conf (that may be optionally merged with
      clamav.conf, command line options overwrite config settings)
    + work-around for potential database downgrade (subtle problem
      in r-r dns handling) - reported by Daniel Mario Vega and patched
      by Luca Gibelli

Fix build by rather patch "configure" directly instead of configure.in
(autoconf failed). Tested on NetBSD-current and Linux (some kind of Debian).