Added a port for the_silver_searcher a fast grep like utility with some
additional features.

The licence is Apache 2 which seems BSD compatible, yet the build was
not a straight forward. The source code does not ship its own configure
but you have to bootstrap it. And that was far from simple: I ended up
patching the provided build.sh to make the_silver_searcher work. This is
definitely something I have to contact the developer about.
Fixed WANTLIB as suggested by porter's handbook.
Fixed the COMMENT, as described in the porters handbook. And removed
some things that were redundant.
Improved the package description.
Fixed many of Brian Callahan's suggesstions from the ports mailinglist.
Opted to package it myself and ship proper configure scripts so that no
patches are required.
Finally fixed for compilation with CONFIGURE_STYLE=gnu.
Since the tarball is now proper so no need for autoconf anymore.
A simple and minor formatting tweak.
Merge branch 'master' of github.com:jasperla/openbsd-wip