new redisInfo for multiple colons in info string

Second try - sorry after I fixed this, I found an unrelated bug, and closed it.  But I'm pretty sure this patch is right.

This is a change for redisInfo to work on windows; on windows it's possible (likely) that the configuration file part of the info looks like this:

config_file:C:\Redis/redis.windows.conf\r\n

when this happens, strsplit splits this into 3 and ultimately leads to an error like:

Error in names(z) <- w[o] :
'names' attribute [70] must be the same length as the vector [69]