Core: new argument '-b' to print build information to stdout

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
Event: if wakeup fails, do not stop the server, just warn and return -1

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
Event: check that socket is alive before trigger hooks.

When the events take place in the worker epoll queue, the timeout
routine can remove and inactivate a client session, but sometimes
a write event reporeted by the same epoll_wait() loop can be queued
and can cause some inconsistences.

For safety this patch makes the read and write event connection hooks
to validate the epoll state before to proceed.

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
Event: move event check to plugin logic

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
Event: verbose message on error when waking up connection

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
MariaDB: update doc

Signed-off-by: swpd <swpdtz@gmail.com>
KV: Update to Unqlite 1.1.6 hotfix (20130825)

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
MariaDB: update doc

Signed-off-by: swpd <swpdtz@gmail.com>
Merge commit '64c50d6e7012d3116911a6228a144feeb575fda9' into mariadb
Merge commit '4881f9ce28e63ce07a8a38ebb2298288b8616fdf' into mariadb
Merge branch 'master' of git://git.monkey-project.com/monkey into mariadb