graphics/imlib:
- Remove :oldver from USES=libtool and bump dependent ports
- Make diskd and rock storage schemes options (diskd enabled by default) [1]
- Add note in pkg-message about diskd needing some tuning [1]
- Fix transparent proxy with PF [1] [2]
- Fix a pair of typos [1]

PR:		193705 [1], 193752 [2]
Submitted by:	arcade@b1t.name [1], kib@ [2]
Work around GCC 4.2 bugs to fix build.

Reported by:	antoine
Allow staging as a regular user
Bump portrevision as files were not packaged with intended owner
Allow staging as a regular user
Bump portrevision as files were not packaged with intended owner