Fix traceback for change permission screen

This occurred in datasets that do not contain .samba4 within them.

Ticket:	#4214
Increase timeout waiting for HTTP HEAD reply

Ticket:	#4227
Fix last migration to contain afp_umask field
Allow afp_umask to be blank

Ticket:	#4229
Fix crontab redirect options

FreeBSD sed(1) does not respect input and always append a new line,
workaround it by deleting new lines with tr(1).

Ticket:	#4175
Dump core to a location with some space ... n' stuff.
Make the non-stripping-of-binaries code work... it was broken.
Don't exclude so many libraries from being stripped or we run out of space