[1.7] cygwin inet_ntop prints IPv6 addresses in upper-case.

[lennox@cs.columbia.edu]

This is fairly superficial, but I noticed that cygwin 1.7's inet_ntop
function prints hex bytes in IPv6 addresses in upper-case.

This is inconsistent with what inet_ntop does on every other platform I've
tested, and a recent Internet-Draft
<http://www.ietf.org/internet-drafts/draft-kawamura-ipv6-text-representation-00.txt>
also recommends printing IPv6 addresses in lower-case, among other reasons
because upper-case "D" is harder to distinguish visually from "0".

It looks like _small_sprintf in winsup/cygwin/smallprint.c doesn't have any
code to print lower-case hex, though.

Cygwin:

$ ~/inet-ntop-test.exe 2002:8281:52fc:5:34cb:4e60:950b:82b5
2002:8281:52fc:5:34cb:4e60:950b:82b5 -> 2002:8281:52FC:5:34CB:4E60:950B:82B5

Linux:

$ ./inet-ntop-test 2002:8281:52fc:5:34cb:4e60:950b:82b5
2002:8281:52fc:5:34cb:4e60:950b:82b5 -> 2002:8281:52fc:5:34cb:4e60:950b:82b5

-- 
Jonathan Lennox
lennox at cs dot columbia dot edu

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