Add nsupdate(1) support

The 'nsupdate' protocol is used to submit Dynamic DNS Update requests as
defined in RFC2136 to a name server using the 'nsupdate' command line
utility part of ISC BIND.  Dynamic DNS updates allow resource records to
be added or removed from a zone configured for dynamic updates through
DNS requests protected using TSIG.  BIND ships with 'ddns-confgen', a
utility to generate sample configurations and instructions for both the
server and the client.  See nsupdate(1) and ddns-confgen(8) for details.
Removed revision information

Revision information isn't very usable when switching to git.
Merge pull request #3 from droe/feature/nsupdate

Add nsupdate(1) support
Only delete A RR, not any RR for the FQDN

Make the delete command specific to A RRs.  This prevents ddclient from
deleting other RRs unrelated to the dynamic address, but on the same
FQDN.  This can be specifically a problem with KEY RRs when using SIG(0)
instead of symmetric keys.

Reported by:	Wellie Chao
Bug report:	http://sourceforge.net/p/ddclient/bugs/71/
Merge pull request #4 from droe/bug/sf/71

Only delete A RR, not any RR for the FQDN
Interfaces can be named almost anything on modern systems.
Merge pull request #5 from SattaiLanfear/master

Interfaces can be named almost anything on modern systems.
Added support for Cloudflare and multi domain support for namecheap
Merge pull request #1 from roberthawdon/develop

Added support for Cloudflare and multi domain support for namecheap
remove patch backup
Bugfix: Long username-password-combinations will not result in an authentication error anymore.

If a username-password-combination is too long, perl's encode_base64 method will break the encoded string (stored in $auth) up into multiple lines of no more than 74 chars[0]. This breaks HTTP's authorization, since long values must not be folded into multiple lines[1].

[0] http://perldoc.perl.org/MIME/Base64.html
[1] http://tools.ietf.org/html/rfc7230#section-3.2.4
Merge pull request #8 from dirdi/master

Bugfix: Long username-password-combinations will not result in an authen...
Fixing bug #72: Account info revealed

Fixing bug #72: Account info revealed during noip update
More info on http://sourceforge.net/p/ddclient/bugs/72/
Merge branch 'master' of https://github.com/wimpunk/ddclient
added Peter Roberts's cloudflare modifications, cleaned up code, updated README.md
removed backup files
Corrected JSON perl library name
Updated comments for cloudflare
Merge pull request #2 from roberthawdon/cloudflare-json

Cloudflare json
Updated sample ddclient.conf