Fixed a nasty old bug where a visual bell in the currently active VTY prevented waking up processes waiting for the output queue to get free on other VTYs.
Fixed a nasty old bug where a visual bell in the currently active
VTY prevented waking up processes waiting for the output queue to
get free on other VTYs.

In collaboration with:	Vsevolod Lobko
MFC after:		1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase