Check if the string is empty.
Rename this variable
Make TsigVerify's MAC comparison take constant time
Merge pull request #76 from andrewtj/atj-constant-time-tsigverify

Make TsigVerify's MAC comparison take constant time
Fix length overrun in EDNS0 parsing.

Original text: (in Dutch)

Ik kreeg crashes (index out of range) in het parsen van een EDNS0_LLQ
optie, doordat de method: 'func (e *EDNS0_LLQ) unpack(b []byte)' een
byte slice van 1 byte groot kreeg waar dan meerdere uint16's uit gelezen
werden.
Merge branch 'master' of github.com:miekg/dns
Make EDNS0 unpack return error on failure

Report these errors upwards when unpacking a message.
Overallocate label index buffer
Merge pull request #77 from millerkil/optimize

Overallocate label index buffer
fix(dns.go): Pref is now Preference

Simple mistake from, what I guess, was an earlier API change.
Optimize compressionLenHelper
Merge pull request #79 from millerkil/opt-compress-help

Optimize compressionLenHelper
Merge pull request #78 from philips/fixup-example

fix(dns.go): Pref is now Preference
Update documentation
dnssec: don't override OrigTtl in sig

When creating a signature and the OrigTtl is already set
don't override it.
The right way around
Add generic Copy function that copies RRs

Don't export all the copy() functions, instead add a Copy() function
that use the RR interface
Merge branch 'master' of github.com:miekg/dns
Small api change to check RRSIG validity
Fi the tests too