Update documentation references for EDNS0 and EDNS0_SUBNET.

Only EDNS0 is defined in RFC 6891 and EDNS0_SUBNET is actually just a draft.
Merge pull request #123 from cpatulea/master

Update documentation references for EDNS0 and EDNS0_SUBNET.
Fix ECDSA algorithms

Current code was completely wrong, so validation of ECDSA didn't work.
The new tests now works, the old one now doesn't
Fix ECDSA algorithms

Current code was completely wrong, so validation of ECDSA didn't work.
The new tests now works, the old one now doesn't
Disabled two failing ECDSA tests
Merge branch 'master' of github.com:miekg/dns
Fix NewPrivateKey ECDSA parsing, and add test
typo in the docs
Merge pull request #125 from FiloSottile/ecdsa_fix

Fix NewPrivateKey ECDSA parsing, and add test
Move the tests into the existing _test.go files.
Remove the GOST scan code.

The code was commented out and was a copy of code with a bug in it.
Basically it is safer to delete this, than to let it in.
Remove Copyrights from there
Remove all copyright notices

Use the central COPYRIGHT file.
Updated code to handle escapes in TXT RDATA

Added test demonstrating error in TXT parsing.
Fixed lexing process and slightly updated conversion
back to strings.

See #126 for details.
Merge pull request #127 from asergeyev/txtescapezscan

Fixed TXT parsing with escaped chars
Added punycode conversion placeholders and...

internal functions that provide conversion and tests for those
per #120.
Moved things to subdir and adding functions to convert strings.
Fixed panic calls to be similar to others in library
Updated Punycode funcs

* docstrings
* changes to handling invalid punycode names
* updated tests
Added package header.