updxlerator: Disable call of chmod on downloader.

Disable the call of chmod after downloading a file. This is not woking because of different
owner's and only flushes the log files.

Fixes #10088.
ovpn+firewall: Extend example and fixed typos

Bug reference #10193 and #10274
proxy.cgi: Also allow to use a hostname for the LDAP server.

Fixes #10265.
proxy.cgi: Allow to set a hostname as upstream proxy.

Fixes #10215.
firewall: Recreate openvpn chains after firewall restart.

Fixes #10216.
samba: update to 3.6.11.
cifs-utils: new package.

last samba update remove mount.cifs so it's now an extra package.
rpi-firmware: disabled idle underclock at default.

A user has reported connection problems if this is enabled.
Merge remote-tracking branch 'stevee/axel-log-fix' into next
core66: add updatexlerator download to updater.
Merge remote-tracking branch 'stevee/proxy-cgi-ldap-hostname' into next
Merge remote-tracking branch 'ummeegge/ovpn-firewall-fixes' into next
core66: remove proxy-cache from the updater/backup.