- Drop .la files, no dependees require them

Approved by:	portmgr blanket
- Drop .la files, no dependees require them

Approved by:	portmgr blanket
Change INSTALL_DATA to install with mode 644
Remove patches and hacks that were used to work around the previous
situation
This allows to stage more ports as a regular user

Differential Revision:	https://reviews.freebsd.org/D703
Reviewed by and discussed with:	bapt
With hat:	portmgr
Update 3.6.0alpha3 --> 3.6.0beta1

Submitted by:	Peter Czanik <peter.czanik@balabit.com> (syslog-ng upline)