repoman: Fix broken userquery import

Commit: 15433c52866e09967142fd2352bd7aad9ad5026f
Author: Alexander Berntsen <bernalex@gentoo.org> (Thu 08 May 2014 08:47:58 AM PDT)
Subject: emerge: Implement "--alert"
portage/emaint/module.py: Fix an indent error in get_class()

Multiple calls to get_class for the same module triggered this bug.
Thanks for triggerring it twitch153.
ebuild-helpers/xattr/install: use install-xattr

Currently bin/ebuild-helpers/xattr/install uses ${PORTAGE_BIN_PATH}/install.py
as a wrapper to coreutils' install to preserve a file's extended attributes when
installing, usually during src_install().  This is needed, for instance, when
preserving xattr based PaX flags, bug #465000.  However the python wrapper is
very slow, comment #42 of bug #465000.  A C wrapper was developed and tested,
bugs #501534 and #511984.  This patch checks for the existence of the C wrapper,
and uses it, falling back on the python wrapper only if not found, or if over-
ridden by ${PORTAGE_INSTALL_XATTR_IMPLEMENTATION}.
man/repoman: Note line inaccuracies (bug 517416)

Signed-off-by: Alexander Berntsen <bernalex@gentoo.org>