rrepair: refactored rr_recon:begin_sync/2
rrepair: refactored rr_recon:begin_sync/2

* no shutdown messages to self() any more
* separate algorithms by function headers
digshock/scalaris,seyyed/scalaris,seyyed/scalaris,digshock/scalaris,digshock/scalaris,tectronics/scalaris,tectronics/scalaris,tectronics/scalaris,tectronics/scalaris,digshock/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris,seyyed/scalaris,digshock/scalaris,tectronics/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris