Changes with nginx 0.7.27 15 Dec 2008

*) Feature: the "try_files" directive.

*) Feature: variables support in the "fastcgi_pass" directive.

*) Feature: now the $geo variable may get an address from a variable. Thanks to Andrei Nigmatulin.

*) Feature: now a location's modifier may be used without space before name.

*) Feature: the $upstream_response_length variable.

*) Bugfix: now a "add_header" directive does not add an empty value.

*) Bugfix: if zero length static file was requested, then nginx just closed connection; the bug had appeared in 0.7.25.

*) Bugfix: a MOVE method could not move file in non-existent directory.

*) Bugfix: a segmentation fault occurred in worker process, if no one named location was defined in server, but some one was used in an error_page directive. Thanks to Sergey Bochenkov.