etc.c: fix parameter

* ext/etc/etc.c (etc_uname): call with same first parameters.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46018 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
etc.c: old VC

* ext/etc/etc.c (etc_uname): fix for old VC.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46019 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
etc.c: fix typo

* ext/etc/etc.c (etc_uname): fix typo, `len` with `plen`, and an
  extra semicolon.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
fix typos [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46021 b2dd03c8-39d4-4d8f-98ff-823fe69b080e