Fix eval usage in tests to conform with eval semantics
Merge remote-tracking branch 'upstream/unstable' into unstable
Fix lack of SA_ONSTACK under Cygwin

Fixes #232
Fix lack of strtold under Cygwin

Renaming strtold to strtod then casting
the result is the standard way of dealing with
no strtold in Cygwin.
Fix blocking operations from missing new lists

Behrad Zari discovered [1] and Josiah reported [2]: if you block
and wait for a list to exist, but the list creates from
a non-push command, the blocked client never gets notified.

This commit adds notification of blocked clients into
the DB layer and away from individual commands.

Lists can be created by [LR]PUSH, SORT..STORE, RENAME, MOVE,
and RESTORE.  Previously, blocked client notifications were
only triggered by [LR]PUSH.  Your client would never get
notified if a list were created by SORT..STORE or RENAME or
a RESTORE, etc.

Blocked client notification now happens in one unified place:
  - dbAdd() triggers notification when adding a list to the DB

Two new tests are added that fail prior to this commit.

All test pass.

Fixes #1668

[1]: https://groups.google.com/forum/#!topic/redis-db/k4oWfMkN1NU
[2]: #1668
Fixed typo in word avarege in result message of --intrinsic-latency analyzer
Cluster test: more reliable 01-faildet unit.

Do things in a sequence that prevents failover during failure detection.
Cluster test: move basic read/write test into a procedure.
Cluster test: basic failover unit added.
Fix test framework to detect proper server PID

Previously the PID format was:
[PID] Timestamp

But it recently changed to:
PID:X Timestamp

The tcl testing framework was grabbing the PID from \[\d+\], but
that's not valid anymore.

Now we grab the pid from "PID: <PID>" in the part of Redis startup
output to the right of the ASCII logo.
Sentinel example config: explain you don't need to specify slaves.
Cluster test: catch FLUSHALL errors on node reset.

FLUSHALL will fail on read-only slaves, but there the command is not
needed in order to reset the instance with CLUSTER RESET so errors can
be ignored.
Cluster: always allow ok -> fail switch in clusterUpdateState().

There is a time defined by REDIS_CLUSTER_WRITABLE_DELAY where fail -> ok
switch is not possible after startup as a master for some time, however
the contrary (ok -> fail) should always be possible.
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
Merge pull request #1775 from mattsta/fix-test-against-new-PID-format

Fix test framework to detect proper server PID
Cluster test: add tmp dir to Git repo.
Small typo fixed
More trailing spaces in sentinel.c removed.
fix issue 1787
Scripting: better Lua number -> string conversion in luaRedisGenericCommand().

The lua_to*string() family of functions use a non optimal format
specifier when converting integers to strings. This has both the problem
of the number being converted in exponential notation, which we don't
use as a Redis return value when floating point numbers are involed,
and, moreover, there is a loss of precision since the default format
specifier is not able to represent numbers that must be represented
exactly in the IEEE 754 number mantissa.

The new code handles it as a special case using a saner conversion.

This fixes issue #1118.