Certificate Chain Security Bypass vulnerability).
- added a couple of post-1.5.20 patches from upstream for regressions
- cleanup the port's handling of sample config files
testing by Simon Kuhnle, Edd Barrett, testing and ok landry@.
landry@ and Brad for testing various versions of this diff.
ok landry@ after a few rounds of pain with Maildir and the sidebar
patch, eventually resulting in snapshot/patches/sidebar-buffy_c.
