Implementation of the internals that make possible to terminate clients overcoming configured output buffer (soft and hard) limits.

fixed typo in hahs function seed default value. It is no longer used but fixed to retain the old constant as default anyway.

Fix for hash table collision attack. We simply randomize hash table initialization value at startup time.

all the stack trace related functions are now in debug.c. Now Redis dumps registers and stack content on crash. Currently osx supported, adding Linux right now.

Track the length of the client pending output buffers (still to transfer) in a new field in the client structure.

It is now posible to flush all the previous saving points in redis.conf by using a save directive with a single empty string argument, like it happens for CONFIG SET save.

Fixed some typos in redis.conf.

Don't change the replication state if SLAVE OF is called with arguments specifying the same master we are already connected with. This fixes issues #290.

On crash print information about the current client (if any), command vector, and object associated to first argument assuming it is a key.

Regression test for the main problem causing issue #141. Minor changes/fixes/additions to the test suite itself needed to write the test.

Protections against protocol desyncs, leading to infinite query buffer growing, due to nul-terms in specific bytes of the request or indefinitely long multi bulk or bulk count strings without newlines. This bug is related to Issue #141 as well.

Fixed replication when multiple slaves are attaching at the same time. The output buffer was not copied correctly between slaves. This fixes issue #141.

Fixed a config docs typo.