Security update to latest versions, sync with HEAD (from nginx 1.2.7 to 1.4.1)

o) www/nginx from 1.4.0 to 1.4.1;
o) www/nginx-devel from 1.4.0 to 1.5.0.

<ChangeLog>

*) Security: a stack-based buffer overflow might occur in a worker
   process while handling a specially crafted request, potentially
   resulting in arbitrary code execution (CVE-2013-2028); the bug had
   appeared in 1.3.9.

   Thanks to Greg MacManus, iSIGHT Partners Labs.

</ChangeLog>