Log Message:
Update net/py-dns to 1.9.4.  Changes since 1.8.0:

2011-03-24  Bob Halley  <halley@dnspython.org>

	* dns/rdata.py (Rdata._wire_cmp): We need to specify no
	  compression and an origin to _wire_cmp() in case names in the
	  rdata are relative names.

	* dns/rdtypes/ANY/SIG.py (SIG._cmp): Add missing 'import struct'.
	  Thanks to Arfrever Frehtes Taifersar Arahesis for reporting the
	  problem.

2011-03-24  Bob Halley  <halley@dnspython.org>

	* (Version 1.9.3 released)

2011-03-22  Bob Halley  <halley@dnspython.org>

	* dns/resolver.py: a boolean parameter, 'raise_on_no_answer', has
	  been added to the query() methods.  In no-error, no-data
	  situations, this parameter determines whether NoAnswer should be
	  raised or not.  If True, NoAnswer is raised.  If False, then an
	  Answer() object with a None rrset will be returned.

	* dns/resolver.py: Answer() objects now have a canonical_name field.

2011-01-11  Bob Halley  <halley@dnspython.org>

	* Dnspython was erroneously doing case-insensitive comparisons
	  of the names in NSEC and RRSIG RRs.  Thanks to Casey Deccio for
	  reporting this bug.

2010-12-17  Bob Halley  <halley@dnspython.org>

	* dns/message.py (_WireReader._get_section): use "is" and not \ 
"=="
	  when testing what section an RR is in.  Thanks to James Raftery
	  for reporting this bug.

2010-12-10  Bob Halley  <halley@dnspython.org>

	* dns/resolver.py (Resolver.query): disallow metaqueries.

	* dns/rdata.py (Rdata.__hash__): Added a __hash__ method for rdata.

2010-11-23  Bob Halley  <halley@dnspython.org>

	* (Version 1.9.2 released)

2010-11-23  Bob Halley  <halley@dnspython.org>

	* dns/dnssec.py (_need_pycrypto): DSA and RSA are modules, not
	  functions, and I didn't notice because the test suite masked
	  the bug!  *sigh*

2010-11-22  Bob Halley  <halley@dnspython.org>

	* (Version 1.9.1 released)

2010-11-22  Bob Halley  <halley@dnspython.org>

	* dns/dnssec.py: the "from" style import used to get DSA from
	  PyCrypto trashed a DSA constant.  Now a normal import is used
	  to avoid namespace contamination.

2010-11-20  Bob Halley  <halley@dnspython.org>

	* (Version 1.9.0 released)

2010-11-07  Bob Halley  <halley@dnspython.org>

	* dns/dnssec.py: Added validate() to do basic DNSSEC validation
	  (requires PyCrypto). Thanks to Brian Wellington for the patch.

	* dns/hash.py: Hash compatibility handling is now its own module.

2010-10-31  Bob Halley  <halley@dnspython.org>

	* dns/resolver.py (zone_for_name): A query name resulting in a
	  CNAME or DNAME response to a node which had an SOA was incorrectly
	  treated as a zone origin.  In these cases, we should just look
	  higher.  Thanks to Gert Berger for reporting this problem.

	* Added zonediff.py to examples.  This program compares two zones
	  and shows the differences either in diff-like plain text, or
	  HTML.  Thanks to Dennis Kaarsemaker for contributing this
	  useful program.

2010-10-27  Bob Halley  <halley@dnspython.org>

	* Incorporate a patch to use poll() instead of select() by
	  default on platforms which support it.  Thanks to
	  Peter Schüller and Spotify for the contribution.

2010-10-17  Bob Halley  <halley@dnspython.org>

	* Python prior to 2.5.2 doesn't compute the correct values for
	  HMAC-SHA384 and HMAC-SHA512.  We now detect attempts to use
	  them and raise NotImplemented if the Python version is too old.
	  Thanks to Kevin Chen for reporting the problem.

	* Various routines that took the string forms of rdata types and
	  classes did not permit the strings to be Unicode strings.
	  Thanks to Ryan Workman for reporting the issue.

	* dns/tsig.py: Added symbolic constants for the algorithm strings.
	  E.g. you can now say dns.tsig.HMAC_MD5 instead of
	  "HMAC-MD5.SIG-ALG.REG.INT".  Thanks to Cillian Sharkey for
	  suggesting this improvement.

	* dns/tsig.py (get_algorithm): fix hashlib compatibility; thanks to
	  Kevin Chen for the patch.

	* dns/dnssec.py: Added key_id() and make_ds().

	* dns/message.py: message.py needs to import dns.edns since it uses
	  it.

2010-05-04  Bob Halley  <halley@dnspython.org>

	* dns/rrset.py (RRset.__init__): "covers" was not passed to the
	  superclass __init__().  Thanks to Shanmuga Rajan for reporting
	  the problem.

2010-03-10  Bob Halley  <halley@dnspython.org>

	* The TSIG algorithm value was passed to use_tsig() incorrectly
	  in some cases.  Thanks to 'ducciovigolo' for reporting the problem.