r20700: In the main processing loop we select() on the fam socket. If it fires, it

r20700: In the main processing loop we select() on the fam socket. If it fires, it
might be possible that we hang in the receive_smb() although that socket is
not the reason for the select() to return.

This immediately reacts to the fam socket to become readable, and goes into
the select loop again. This fixes delays in files showing up in Windows.

Jeremy, James please review this and merge to 3_0_24 if appropriate.

Thanks,

Volker
(This used to be commit c846153b2ed2f9aca82491888e391ccbe239e88a)