Restore use of Ident.clientBegin()
Restore use of Ident.clientBegin()

This was lost when BridgedClient was ported to TypeScript.

Signed-off-by: Jan Alexander Steffens (heftig) <d4d774cda8be684d59f72959e20afdd63aff83f9@gmail.com>

matrix-org/matrix-appservice-irc,matrix-org/matrix-appservice-irc,matrix-org/matrix-appservice-irc