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

shareobjectspoolsize implemented in reds.conf, in order to control the pool size when object sharing is on