[packages/apache] - use default mutext (depends on apr default) instead of forcing file mutex

[Arkadiusz Miśkiewicz]

On Thursday 29 of October 2015, Elan Ruusamäe wrote:
> what's the background of this change?
> just general cleanup?
> or that solves some common crash issues?

General cleanup.

It's upstream default (we were using default from 2005).

-- 
Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )