Small fix in the installation instructions

echo with escape sequences isn't portable. Use printf instead.

Two fixes for replication: Slave performs the AOF rewrite at the right point. Non blocking connect also uses readable handler as with old Linux kernels like 2.6.18 on connection refused the writable even is not fired (kernel bug).

INFO now contains the time (in usecs) needed to fork() in order to persist. The info is available in the stats section of INFO.

redis-cli: -i (interval) implemented, to wait the specified number of seconds (decimal digits are allowed) between commands.

redis-cli in REPL mode is now able to send the same command multiple times, prefixing the command with a number as in "10 ping"

redis-cli no longer aborts in repl-mode on error, and retries to reconncet with the server at every command issued if the state is not connected. Also the prompt shows the server we are connected to.

Fix for Pub/Sub system, introduced in Redis 2.2.6 with the new copy-on-write safe iterator semantics. In the hope this is the last bug I introduced this way.

Fix for a possible bug related to ZINTER/UNIONSTORE called with the same source set more than one time.