touched key for WATCH refactored into a more general thing that can be used also for the cache system. Some more changes towards diskstore working.

Do not update the LRU info on key lookup when we have a saving child. With this trivial change the additional memory used while saving with a background child in presence of many read operations is zero.

Don't increment dirty on expireIfNeeded() as natural expires are not considered database changes. This will avoid useless read-only commands in the AOF file as a result of, for instance, a GET operation triggering an expirIfNeeded() call resulting in an expired key removed.

Object approximated LRU algorithm enhanced / fixed / refactored. This is used for the VM currently but will soon be used for maxmemory expiring.

fixed an alignment problem with time_t is 32 bit, long is 64 bit, and arch is sparc or any other where unaligned accesses will result to sigbus

Fix re-enabled again, I forgot to check if VM was enabled before calling handleClientsBlockedOnSwappedKey()

Fixed a race condition in VM happening when a key was deleted while there was a client waiting for this key to be resumed from swap to memory. The client would hang forever.

Fixed overflow detection in argument to long convertion function in general, and in expire/ttl pairs specifically, addressing issue 54

support for write operations against expiring keys, by master-controlled expiring in replication and AOF synthesizing DEL operations

WATCH will now consider touched keys target of EXPIRE command after the WATCH is performed, but not before

networking related stuff moved into networking.c

moved more code

more work on layout of source code

SDS instantaneuos memory saving. By Pieter and Salvatore at VMware ;)

cleanly compiling again after the first split, now splitting it in more C files

moving more things around... work in progress

split replication code

splitting more

Sets split

Hash split

replication split

even more splitting

more splitting

minor change