Add experimental sysctl to enable multichannel Samba
"It's still experimental due to one bug if a channel fails after
we sent a lease break we don't currently resend down other channels
so we could potentially miss the break response.
Otherwise it works great (with aio enabled of course) !
I'd certainly look into adding an "Experimental Multichannel"
checkbox to allow customers to test, as it can have great
Secret sauce for enabling multi channel in Samba
- This is experimental, so it's hidden
- We should add more Samba performance knobs here
- When adding sysctl's in the UI, we should probably look for the ones
that control Samba options and re-generate the config and reload
Samba when changed
(cherry picked from commit 335d0265338f86224433e89118baad042859b5b6)