Return false if read from socket failed (due to socket close, not due to nonblock read with no data) so that notifier will remove the fd handler; remove custom _debug and use logger debug instead.
Return false if read from socket failed (due to socket close, not due to
nonblock read with no data) so that notifier will remove the fd handler;
remove custom _debug and use logger debug instead.


git-svn-id: 9d763a2146cc7918956fa045a5de4b112f309167@1498 a8f5125c-1e01-0410-8897-facf34644b8e

freevo/kaa-base,freevo/kaa-base