Move autocycle module to extra.

Modern/decent networks have services anyway, and for registered channels
this module is useless. Also it tends to fight ChanServ in case if
ChanServ joins/parts the channel to remove ops.

Users of deprecated ne^W^Wnetworks without services can use it from extra.

diff --git a/modules/autocycle.cpp b/modules/extra/autocycle.cpp
similarity index 100%
rename from modules/autocycle.cpp
rename to modules/extra/autocycle.cpp