fixed compilation with Snow Leopard, thanks to Lon Baker for providing SSH access to Snow Leopard box

now the size of the shared pool can be really modified via config, also the number of objects in the sharing pool is logged when the log level is set to debug. Thanks to Aman Gupta

added utils/redis-copy.rb, a script that is able to copy data from one Redis server to another one on the fly.

Applied three different patches thanks to Chris Lamb, one to fix compilation and get the IP register value on Linux IA64 and other systems. One in order to log the overcommit problem on the logs instead of the standard output when Redis is demonized. The latest in order to suggest a more consistent way in order to switch to 1 the memory overcommit Linux feature.

max bytes in an inline command raised to 1024*1024 bytes, in order to allow for very large MGETs and still protect from client crashes

SPOP implemented. Hash table resizing for Sets and Expires too. Changed the resize policy to play better with RANDOMKEY and SPOP.

Dump a backtrace on sigsegv/sigbus, original coded thanks to Diego Rosario Brogna, modified in order to work on different OSes and to enhance reliability

Avoid a busy loop while sending very large replies against very fast links, this allows to be more responsive with other clients even under a KEY * against the loopback interface

- better output

macosx specific zmalloc.c, uses malloc_size function in order to avoid to waste memory and time to put an additional header