Do not attempt to store SELinux context for /proc and /sys

Storing a (correct) SELinux context for files in procfs and sysfs
leads to tonnes of ugly spew when the tarball is unpacked as these
contexts are not permitted on "normal" file systems:

tar: sosreport-rhel7-vm1-20121210145629/proc/sys/vm: Cannot setfilecon: Permission denied
tar: sosreport-rhel7-vm1-20121210145629/proc/sys/vm/percpu_pagelist_fraction: Cannot setfilecon: Permission denied
tar: sosreport-rhel7-vm1-20121210145629/proc/sys/vm: Cannot setfilecon: Permission denied
tar: sosreport-rhel7-vm1-20121210145629/proc/sys/vm/scan_unevictable_pages: Cannot setfilecon: Permission denied

Etc.

Check for these path prefixes in TarFileArchive.add_file() and skip
generating a pax header for them.

This isn't a perfect fix; it may be better to move this up to a
higer layer (i.e. within the Plugin class's file handling routines)
and also to filter by context rather than path (since SELinux
contexts are a property of an inode not a path and a user could
mount these file systems at other locations).

This partially fixes Issue #79 but I'll keep it open for the time
being to track these improvements.

0 files changed, 0 insertions, 0 deletions