Update to latest development version 0.7.0.

<ChangeLog>

*) 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.

</ChangeLog>