Stop adding chkconfig service to every run level

Let chkconfig assign default runlevels.
Core: apply FAM blocking option to all commands that start a server
Core: Gracefully handle failure to add client without default group
Metadata: fixed long line
Copy xml elements before appending to tree.  This prevents modified entries from being added
repoint some trac links to github
Merge pull request #114 from igorwidlinski/patch-1

Chkconfig should not set service to "on" on every run level
Don't crash when a file diff contains utf-8 chars

This fixes a crash when the client tries to render the diff of a file
which includes unicode characters. This change assumes that utf-8 is the
default encoding, which looking at the rest of the code appears to be a
safe bet.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Merge branch 'utf8-fixes' of https://github.com/stgraber/bcfg2 into maint
Encryption: reduce noise from encryption failures when decrypt=lax
Read-only yum cache

This makes the yum cache read-only so that bcfg2-yum-helper cannot
update the cache on the fly, which should help avoid locking issues
with the yum caches that can cause client runs to fail.  It also makes
the Packages plugin behave more consistently, since use of yum
libraries won't cause the cache to be refreshed at random times on the
fly, but rather more predictably as with the Apt cache or the yum
cache without using yum libraries.  Unlike those two cases, though,
the caches will not all be downloaded initially, but rather
opportunistically as needed.

In order for this to work, the Bcfg2 server must not run as root.
Root ignores the 'w' permissions bit, so the cache cannot be made
read-only.
Packages: added missing docstring
Core: handle unknown log handlers without names gracefully
POSIXUsers: remove usermod -m option, which is too new
POSIXUsers: updated tests for removal of -m
Bcfg2/Client/Tools: do not get bootstatus directly from the entry

Bootstatus is optional and should have the value of status if not specified.
This is handled by get_bootstatus.
Merge branch 'fix-bootstatus' of https://github.com/AlexanderS/bcfg2 into maint
Packages: use a separate yum persistdir per cache
Packages: better stringification/representation of OnDemandDict
Packages: fixed read-only yum cache

Replaced incredibly stupid (mea culpa!) and race-condition-prone
system that toggled filesystem permissions (what was I thinking?!?)
with judicious application of the yum cacheonly option.