Add iptables rule to add miniupnd rules to forward chain.

Fixes #10043.
sendEmail: New addon

Fixes #10242
nfs: Update to 1.2.7.

Also update libnfsidmap to 0.27.
ovpnmain.cgi: Fix downloading of client packages.

It was only possible to download the client packages if the OpenVPN server is running - which is very confusing.

Fixes #10300.
index.cgi: Show OpenVPN header if server is disabled but N2N connections are used.

If the ovpn server for roadwarrior connections was stopped, there was no OpenVPN header
displayed on the index.cgi. If there are configured Net-to-Net connections, they
could be established in the background but their  status can be found
on the VPN (IPsec) section which is wrong. If there is also no IPsec
configured there aren't any information about the Net-to-Net connections on the start page.
ovpnmain.cgi: Change check for pushed dhcp domains.

The Domainname is now checked against validdomainname instead of validfqdn,
so there's no need of a dotted domainname anymore.

Fixes #10262.
updateaxelerator: Adding line to hint where to add new sources.

Fixes #10253.
updatexlrator.cgi: Vendor icon "updxl-src-unknown.gif" are used, regardless of presence in image-dir.

Fixes #10254.
updateaxelerator: Add extension for Windows 8 updates.

New extension for Windows 8 update files (msu).

Fixes #10326.
Merge branch 'ovpn-client-pkg-download' into core67-merge
Merge remote-tracking branch 'erik/sendEmail' into core67-merge

Conflicts:
	make.sh
Merge branch 'iptables-upnpfw' into core67-merge
Merge branch 'ovpn-header-on-index.cgi' into core67-merge
Merge branch 'nfs-utils-update' into core67-merge
Merge remote-tracking branch 'stevee/core67-merge' into next

Conflicts:
	make.sh
core67: add last changes.
core66: moved to oldcore.
Merge branch 'next' of ssh://git.ipfire.org/pub/git/ipfire-2.x into next