REORG: server: uninline the idle conns management functions

The following functions are quite heavy and have no reason to be kept
inlined:

   srv_release_conn, srv_lookup_conn, srv_lookup_conn_next,
   srv_add_to_idle_list

They were moved to server.c. It's worth noting that they're a bit
at the edge between server and connection and that maybe we could
create an idle-conn file for these in the near future.
2 files changed