*/*unit*: update NGINX Unit: 1.29.1 -> 1.30.0

<ChangeLog>

*) Change: remove Unix domain listen sockets upon reconfiguration.

*) Feature: basic URI rewrite support.

*) Feature: NJS loadable modules support.

*) Feature: per-application logging.

*) Feature: conditional logging of route selection.

*) Feature: support the keys API on the request objects in NJS.

*) Feature: default values for 'make install' pathnames such as prefix;

this allows to './configure && make && sudo make install'.

*) Feature: "server_version" setting to omit the version token from

"Server" header field.

*) Bugfix: request header field values could be corrupted in some cases;

the bug had appeared in 1.29.0.

*) Bugfix: PHP error handling (added missing 403 and 404 errors).

*) Bugfix: Perl applications crash on second responder call.

</ChangeLog>