- Convert to USES=autoreconf
- Remove :build from USES=libtool because this port does not need
  /usr/local/bin/libtool
Avoid a dependency on devel/libtool
- Remove :build from USES=libtool because this port does not need
  /usr/local/bin/libtool
- Don't replace -lpthread with -pthread because they are the same
Patch configure instead of aclocal.m4 to avoid USE_AUTOTOOLS
Patch configure instead of aclocal.m4 to avoid USE_AUTOTOOLS
Fix option

Reported by:	mat
- Add ftpmirror.gnu.org to GNU master sites (redirects to a nearby mirror)
- Update GNU alpha sites
- Set default GNU alpha subdirectory
Readd a removed (by accident) runtime dependency

Reported by:	mat
www/libevhtp: fix build for 8.4 systems

PR:		193615
Submitted by:	Jingfeng Yan <yan_jingfeng@yahoo.com>
Approved by:	mentors (implicit)