HyperLogLog regression test for issue #1762.
Remove trailing spaces from sentinel.c.
Remove trailing spaces from scripting.c
While ANET_ERR is -1, check syscall retval for -1 itself.
Accept multiple clients per iteration.

When the listening sockets readable event is fired, we have the chance
to accept multiple clients instead of accepting a single one. This makes
Redis more responsive when there is a mass-connect event (for example
after the server startup), and in workloads where a connect-disconnect
pattern is used often, so that multiple clients are waiting to be
accepted continuously.

As a side effect, this commit makes the LOADING, BUSY, and similar
errors much faster to deliver to the client, making Redis more
responsive when there is to return errors to inform the clients that the
server is blocked in an not interruptible operation.
Process events with processEventsWhileBlocked() when blocked.
Test: fixed scripting.tcl test false positive.
Sentinel example config: explain you don't need to specify slaves.
Disable recursive watchdog signal handler

If we are in the signal handler, we don't want to handle
the signal again.  In extreme cases, this can cause a stack overflow
and segfault Redis.

Fixes #1771
More trailing spaces in sentinel.c removed.
Tests for min-slaves-* feature.
Don't process min-slaves-to-write for slaves.

Replication is totally broken when a slave has this option, since it
stops accepting updates from masters.

This fixes issue #1434.
fixing the number of arguments aeProcessEvents
Enabling githash for release x64
Upgrading the redis binary version to 2.8.10