Log Message:
Changes 8.3.10:
* Add new configuration parameter ssl_renegotiation_limit to control
  how often we do session key renegotiation for an SSL connection
* Fix possible deadlock during backend startup
* Fix possible crashes due to not handling errors during relcache
  reload cleanly
* Fix possible crash due to use of dangling pointer to a cached plan
* Fix possible crashes when trying to recover from a failure in
  subtransaction start
* Fix server memory leak associated with use of savepoints and a
  client encoding different from server's encoding
* Fix incorrect WAL data emitted during end-of-recovery cleanup of a
  GIST index page split
* Make substring() for bit types treat any negative length as meaning
  "all the rest of the string"
  The previous coding treated only -1 that way, and would produce an
  invalid result value for other negative values, possibly leading to
  a crash (CVE-2010-0442).
* Fix integer-to-bit-string conversions to handle the first
  fractional byte correctly when the output bit width is wider than
  the given integer by something other than a multiple of 8 bits
* Fix some cases of pathologically slow regular expression matching
* Fix assorted crashes in xml processing caused by sloppy memory
  management
* Fix bug with trying to update a field of an element of a
  composite-type array column
* Fix the STOP WAL LOCATION entry in backup history files to report
  the next WAL segment's name when the end location is exactly at a
  segment boundary
* Fix some more cases of temporary-file leakage
  This corrects a problem introduced in the previous minor release.
  One case that failed is when a plpgsql function returning set is
  called within another function's exception handler.
* Improve constraint exclusion processing of boolean-variable cases,
  in particular make it possible to exclude a partition that has a
  "bool_column = false" constraint
* When reading "pg_hba.conf" and related files, do not treat
  @something as a file inclusion request if the @ appears inside
  quote marks; also, never treat @ by itself as a file inclusion
  request
* Prevent infinite loop on some platforms if a directory is named as
  an inclusion target in "pg_hba.conf" and related files
* Fix possible infinite loop if SSL_read or SSL_write fails without
  setting errno
  This is reportedly possible with some Windows versions of openssl.
* Disallow GSSAPI authentication on local connections, since it
  requires a hostname to function correctly
* Make ecpg report the proper SQLSTATE if the connection disappears
* Fix psql's numericlocale option to not format strings it shouldn't
  in latex and troff output formats
* Make psql return the correct exit status (3) when ON_ERROR_STOP and
  --single-transaction are both specified and an error occurs during
  the implied "COMMIT"
* Fix plpgsql failure in one case where a composite column is set to NULL
* Fix possible failure when calling PL/Perl functions from PL/PerlU
  or vice versa
* Add volatile markings in PL/Python to avoid possible
  compiler-specific misbehavior
* Ensure PL/Tcl initializes the Tcl interpreter fully
  The only known symptom of this oversight is that the Tcl clock
  command misbehaves if using Tcl 8.5 or later.
* Prevent crash in "contrib/dblink" when too many key columns are
  specified to a dblink_build_sql_* function
* Allow zero-dimensional arrays in "contrib/ltree" operations
* Fix assorted crashes in "contrib/xml2" caused by sloppy memory
  management
* Make building of "contrib/xml2" more robust on Windows
* Fix race condition in Windows signal handling
  One known symptom of this bug is that rows in pg_listener could be
  dropped under heavy load.
* Update time zone data files to tzdata release 2010e for DST law
  changes in Bangladesh, Chile, Fiji, Mexico, Paraguay, Samoa.