Update to 1.9.2 and add Python 2.6 subpackage

New since 1.8.0:

   dnspython now uses poll() instead of select() when available.

   Basic DNSSEC validation can be done using dns.dnsec.validate()
   and dns.dnssec.validate_rrsig() if you have PyCrypto 2.3 or
   later installed.  Complete secure resolution is not yet
   available.

   Added key_id() to the DNSSEC module, which computes the DNSSEC
   key id of a DNSKEY rdata.

   Added make_ds() to the DNSSEC module, which returns the DS RR
   for a given DNSKEY rdata.

   dnspython now raises an exception if HMAC-SHA284 or
   HMAC-SHA512 are used with a Python older than 2.5.2.  (Older
   Pythons do not compute the correct value.)

   Symbolic constants are now available for TSIG algorithm names.

Bugs fixed since 1.8.0

   dns.resolver.zone_for_name() didn't handle a query response
   with a CNAME or DNAME correctly in some cases.

   When specifying rdata types and classes as text, Unicode
   strings may now be used.

   Hashlib compatibility issues have been fixed.

   dns.message now imports dns.edns.

   The TSIG algorithm value was passed incorrectly to use_tsig()
   in some cases.