Taking advantage of the new callbacks added in dcf38ac6a38c and
9c450185bac1 avoids extra timers, extra syscalls and sending the `<r>`
in its own TCP segment, improving efficiency.
The function was too large to comprehend! Breaking it up helps
readability and reuse.
The timer round rip is only to avoid ordering weirdness when sending
from inside a stanza filter. No need when handling <r> and <a>
CSI interactions both boiled down to sending an <r> immediately.
module:add_timer() creates a timer that stops working after the module
is reloaded or unloaded, in order to prevent leaks. However, when the
timers control vital session behavior, breakage occurs after reload.
E.g. sessions would stop requesting acks and stop responding to acks.
Unstoppable stoppable timer compat not needed since 26f54b462601 ca 0.11.0
module:hook_stanza was renamed in 2012
No idea what was going on with the indentation and such
Kim Alvefur