Fix validation of zfs volume name
Make IEC/SI map global so it can be used externally
Be more consistent and specify the zvol size in IEC

While I'm here accept spaces.

Ticket:	#4857
Show zvols size using IEC suffix for consistency

Ticket:	#4857
Fix SI suffix for kilobyte
Correct debug entry.

Ticket: #4863
Delay updates and deletes to make the process appear more like atomic.

Ticket: #4871
If compressing with pxz use more threads than the
default of 4.

Going from 4 to 8 is almost linear.  Going from 8 to
16 is about 50%. Beyond 16 starts to see diminishing returns,
however because this was tested on a 16 core machine it may
be that going past physical cores is the tipping point.

I plan to revisit this and if that is indeed the case have it autoscale
to the number of physical cores, or something more intelligent than just
picking a value.

However since the current system is simply picking a value (4)
I see no harm in increasing it as a first pass, especially when it
speeds up the compressing images steps by over a minute each.
Yet another acl setting program, much faster than python version.
Keep all the things static!
Tell notifier about our new shiny acl program
GUI option to redirect HTTP to HTTPS

Ticket:	#4781
Backend to do not redirect HTTP -> HTTPS

Ticket:	#4781
Restart nginx if http -> https option has changed
Double number of tildes from webshell paste

Ticket:	#4887