stunnel 5.07

5.07 stable. This release fixes the problem that forced us onto the
beta build with the last update.

Closes #33803.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
stunnel: update 5.07 bottle.
megatools 1.9.93 (new formula)

Cli tools for interfacing with the webservice mega.co.nz.
megatools: add 1.9.93 bottle.