Changes with nginx 0.7.0 19 May 2008

    *) Change: now the 0x00-0x1F, '"' and '' characters are escaped as
       xXX in an access_log.
       Thanks to Maxim Dounin.

    *) Change: now nginx allows several "Host" request header line.

    *) Feature: the "modified" flag in the "expires" directive.

    *) Feature: the $uid_got and $uid_set variables may be used at any
       request processing stage.

    *) Feature: the $hostname variable.
       Thanks to Andrei Nigmatulin.

    *) Feature: DESTDIR support.
       Thanks to Todd A. Fisher and Andras Voroskoi.

    *) Bugfix: a segmentation fault might occur in worker process on Linux,
       if keepalive was enabled.