plperlNG. Review and minor cleanup/improvements by Joe Conway.

Summary of new functionality:
- Shared data space and namespace. There is a new global variable %_SHARED
  that functions can use to store and save data between invocations of a
  function, or between different functions. Also, all trusted plperl function
  now share a common Safe container (this is an optimization, also), which
  they can use for storing non-lexical variables, functions, etc.
- Triggers are now supported
- Records can now be returned (as a hash reference)
- Sets of records can now be returned (as a reference to an array of hash
  references).
- New function spi_exec_query() provided for performing db functions or
  getting data from db.
- Optimization for counting hash keys (Abhijit Menon-Sen)
- Allow return of 'record' and 'setof record'

problems with starting subtransactions inside already-failed transactions.
Clean up some comments.

an empty input string causes an empty output string to be returned, instead of
throwing an ERROR -- per complaint from Aaron Hillegass, and consistent with
double metaphone. Fix examples in README.soundex pointed out by James Robinson.

performance front, but with feature freeze upon us I think it's time to
drive a stake in the ground and say that this will be in 7.5.

Alvaro Herrera, with some help from Tom Lane.

	Note that this still has some bugs. The functionality is there though, it's just a matter of fixing the bugs now.
Cleaned up error handling in preprocessor.

2 Rework support for html tags in parser
3 add HighlightAll to headline function for generating highlighted
  whole text with saved html tags

only because 14627 still contained the same node that BitWithoutLength had
just produced.  Make it more transparent.  Also adjust ConstCharacter
to be coded the same way for consistency.

- Variables that are out of scope, were not removed all the time.
- Make a varchar NULL set everything to 0 when not using indicators.
- Synced parser.

specified in just one place and adhered to exactly, rather than just more
or less.  A side effect is to increase PGSTAT_ACTIVITY_SIZE (maximum
reported query length) from 256 to nearly 1000.

Gavin Sherry

aggregates, conversions, functions, operators, operator classes,
schemas, types, and tablespaces.  Fold the existing implementations
of alter domain owner and alter database owner in with these.

Christopher Kings-Lynne

This eliminates the assumption that a serial column's sequence will
have the same name on reload that it was given in the original database.

Christopher Kings-Lynne

we also have done for the data directory permissions check.

Dave Page

translation has to be complete sentences.

routine to do something appropriate on Win32.  Also, add a security check
on Win32 that parallels the can't-run-as-root check on Unix.

Magnus Hagander

Magnus Hagander

that aren't able to feed the password to initdb's /dev/tty.

Magnus Hagander

Per trouble report from Andreas Pflug.

both frontend and backend.  Per Andreas Pflug.

Claudio Natoli and Magnus Hagander