Glibc port: commit clenup

[Anatoly A. Kazantsev]

Hello,

I've seen Upstreaming the glibc Hurd port thread and want to help with
the "boring" part of it. As the first step I'm going to go throw all
affected branches and fix/check for following topics:

- Copyright notices (years and wording in licence notice).
- Comment on the first line.
- Drop "Contributed by" notices.
- Code formatting (spaces and indents, etc). I'm pretty sure I won't
  spot everything :-)
- Will check/grep for various "not recommended" things from Glibc
  Coding Style and Conventions manual [1].

I will report on what I won't be able to fix/change myself.

I've discussed with Samuel the way I should organise and commit my
changes on irc.

[1] https://sourceware.org/glibc/wiki/Style_and_Conventions

-- 
Regards,
Anatoly