Log Message:
- Work around symbol name conflict with dprintf in current.

- The makefile's substitution of PREFIX and SH accidentally got rolled
into patch-ac at some point and thereby hardcoded. Since all patch-ac
was doing was setting these, make the substitution work without a
patch and remove patch-ac entirely.

- Commit some LP64 fixes I've had sitting in my tree since 2008 for
some reason.

- Fix some pkglint.

- PKGREVISION -> 4.