Major changes are:
- better detection of double applied patches
- rejects remain unified diffs for unified patches
- far less limitations, e.g. patch lines may be arbitrary long
This addresses PR standards/11220 by changing patch -b behavior to be
POSIX compliant. Old behavior can be obtained using --suffix, which
works since NetBSD 1.4. pkgsrc has been adjusted accordingly.
from malloc etc. are handled.
This removes the old behavior to retry the operation with a less memory-
consuming method in case malloc failed (this mechanism has never really
worked, and is hard to test. Besides, it is less useful now than it was
20 years ago when the code was written...)
