*/*: update NGINX JavaScript 0.8.0 -> 0.8.1

Bump PKGREVISION for www/nginx, www/nginx-devel, and www/unit.

<ChangeLog>

    nginx modules:

    *) Feature: introduced js_periodic directive.
        The directive specifies a JS handler to run at regular intervals.

    *) Feature: implemented items() method for a shared dictionary.
      The method returns all the non-expired key-value pairs.

    *) Bugfix: fixed size() and keys() methods of a shared dictionary.

    *) Bugfix: fixed erroneous exception in r.internalRedirect()
      introduced in 0.8.0.

    Core:

    *) Bugfix: fixed incorrect order of keys in
      Object.getOwnPropertyNames().

</ChangeLog>

(osa)