server: Add overloaded methods which don't use client id
server: Add overloaded methods which don't use client id

In the future CCF will not use client id to get username from a hashmap.
Instead the username will be in a Thread local variable. The old methods can
be dropped when upgrade is completed.

Signed-off-by: Nuutti Rintala <c1fdae2d91f4b7dda69ea7bf7d9378472e503063@reaktor.fi>

akisaarinen/ccf,akisaarinen/ccf