Enabled all php://xxxxxx targets

[TeslaDethray]

This tweak allows users to make use of php://stderr and other such destinations. Without, trying to target STDERR will err when attempting to create the handle.

[onno-vos-dev]

@tesla: I'm the one who originally implemented the log to php targets and I vaguely remember I had a reason for these targeting only these specific outputs.

Are we sure it works for all php targets? I can't remember why I chose for this implementation but something in my mind tells me I tried your implementation and ran into some troubles. Maybe I'm mistaken though....?

[TeslaDethray]

@onno-vos-dev: Well, it doesn't actually work for php://filter, php://input, or php://stdin, but those aren't valid targets anyway. (It doesn't cause any problems, though. If someone has some clever way to use those as targets, then it would probably work.) It does work for php://memory, php://temp, and php://stderr.

I've been curious - why wasn't the logger set up to go to STDERR, but to STDOUT?

[onno-vos-dev]

Honestly I don't know why we excluded stderr... I don't think we really had a valid reason for it.

All I know is I was working from:
#34

And no stderr was mentioned there so I'm guessing I just left it at that.

I just tried out your branch and all is good so I say: Ship it!

(On my phone so sorry for not putting nice links and @ tags)

[katzgrau]

Shipped