- Do not suppress .bak-files when patching things with ``sed(1) -i'',
those can be useful for debugging and catching no-ops
- Drop `files/manfiles', it is no longer used (looks like a relic from
pre-staging times)
- Do not pass ``-as "${AS} ${ASFLAGS}"'' in the initial CONFIGURE_ARGS:
when ARM support was added in r361233, appropriate values are passed
conditionally (subject to ${ARCH}), see line 69
- Simplify handling of CFLAGS (obtained from RedHat package): rather
than passing them as part of the compiler and "fixing" one generated
Makefile in `post-configure', teach the configure script about them