Update to 2.0.17

Properly configure default data and log directories.

Enable OPENSSL as default open -- crypto should be possible
out of the box.
- Fix minimum pkg version check when using pkg from git. Strip out everything
  after '-' as it is a hash. It is not strictly newer than the implicit 0.
- Reword msg [1]

Submitted by:	adamw [1]
With hat:	portmgr
Security update from 1.7.4 to 1.7.5.
Temporary disable two third-party modules: supervisord and rtmp.

<ChangeLog>

*) Security: it was possible to reuse SSL sessions in unrelated contexts
   if a shared SSL session cache or the same TLS session ticket key was
   used for multiple "server" blocks (CVE-2014-3616).
   Thanks to Antoine Delignat-Lavaud.

*) Change: now the "stub_status" directive does not require a parameter.

*) Feature: the "always" parameter of the "add_header" directive.

*) Feature: the "proxy_next_upstream_tries",
   "proxy_next_upstream_timeout", "fastcgi_next_upstream_tries",
   "fastcgi_next_upstream_timeout", "memcached_next_upstream_tries",
   "memcached_next_upstream_timeout", "scgi_next_upstream_tries",
   "scgi_next_upstream_timeout", "uwsgi_next_upstream_tries", and
   "uwsgi_next_upstream_timeout" directives.

*) Bugfix: in the "if" parameter of the "access_log" directive.

*) Bugfix: in the ngx_http_perl_module.
   Thanks to Piotr Sikora.

*) Bugfix: the "listen" directive of the mail proxy module did not allow
   to specify more than two parameters.

*) Bugfix: the "sub_filter" directive did not work with a string to
   replace consisting of a single character.

*) Bugfix: requests might hang if resolver was used and a timeout
   occurred during a DNS request.

*) Bugfix: in the ngx_http_spdy_module when using with AIO.

*) Bugfix: a segmentation fault might occur in a worker process if the
   "set" directive was used to change the "$http_...", "$sent_http_...",
   or "$upstream_http_..." variables.

*) Bugfix: in memory allocation error handling.
   Thanks to Markus Linnala and Feng Gu.

</ChangeLog>