Revision 122906

- fix a bug in A-T config generation, when a vhost entry was in
autogenerated httpd.conf (e.g. coming from .pm file) and another from
extra.conf.in. We used to have a ports collision, since extra.conf
wasn't reparsed and the same port was getting assigned to more than
one vhost entry, preventing server startup:
  default_ VirtualHost overlap on port 8530, the first has precedence
  (98)Address already in use: make_sock: could not bind to address
  0.0.0.0:8530 no listening sockets available, shutting down
could be reproduced with t/TEST -conf followed by t/TEST -maxclients 1
in the mp2 test suite (or the new Apache-TestMe test suite, which now
includes a special setup for this bug).
- added a test reproducing this problem in Apache-TestItSelf
- added the setup required to reproduce this problem in Apache-TestMe