patch from Timo Sirainen.

sockaddr.sa_len and sockaddr.sin_len, respectively (replacing
HAVE_SOCKADDR_LEN).

"refuse options" value.  Also changed the idiom used to mark refused
options in the popt struct.

identified what was wrong.

- Don't use the NGROUPS_MAX define.

- The do_mkstemp() routine now preserves the errno value from fchmod()
  if that call fails.
- Improved the CHECK_RO macro stuff.

shouldn't generate a path with a double-leading slash anymore.

to do when the root of the transfer was "/").

protocols are no longer supported.

should be minimized.

- Optimized the keep_backup() code.

pointer is no longer valid.

output in older rsync versions).

avoid core-dump.