exim exim-html: updated to 4.96

New stuff we've added since 4.95:

  - A new ACL condition: seen. Records/tests a timestamp against a key.
  - A variant of the "mask" expansion operator to give normalised IPv6.
  - UTC output option for exim_dumpdb, exim_fixdb.
  - An event for failing TLS connects to the daemon.
  - The ACL "debug" control gains options "stop", "pretrigger" and "trigger".
  - Query-style lookups are now checked for quoting, if the query string is
    built using untrusted data ("tainted").  For now lack of quoting is merely
    logged; a future release will upgrade this to an error.
  - The expansion conditions match_<list-type> and inlist now set $value for
    the expansion of the "true" result of the ${if}.  With a static list, this
    can be used for de-tainting.

Notable removals since 4.95:

  - the "allow_insecure_tainted_data" main config option and the
    "taint" log_selector.  These were deprecated in the 4.95 release.

(adam)