Revision 417369

- Update to 4.5.3 [1]
- While here: [2]
  - Fix LICENSE
  - Remove bogus BROKEN_powerpc64 - this port does not even have build phase, so any build failures indicate infrastructure, not port's problems
  - Switch to options helpers and fix some minor style nits (silence mkdirs)

PR:		210480 [1]
Submitted by:	9267096@gmail.com (maintainer) [1]
Approved by:	portmgr blanket [2]