pgsql: Improve support of Hunspell in ispell dictionary.

Improve support of Hunspell in ispell dictionary.

Now it's possible to load recent version of Hunspell for several languages.
To handle these dictionaries Hunspell patch adds support for:
* FLAG long - sets the double extended ASCII character flag type
* FLAG num - sets the decimal number flag type (from 1 to 65535)
* AF parameter - alias for flag's set

Also it moves test dictionaries into separate directory.

Author: Artur Zakirov with editorization by me

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/d78a7d9c7fa3e9cd494b906f065fe7b7fe9fb9a5

Modified Files
--------------
doc/src/sgml/textsearch.sgml | 148 ++++-
src/backend/tsearch/Makefile | 7 +-
src/backend/tsearch/dicts/hunspell_sample.affix | 24 +
.../tsearch/dicts/hunspell_sample_long.affix | 35 ++
.../tsearch/dicts/hunspell_sample_long.dict | 8 +
.../tsearch/dicts/hunspell_sample_num.affix | 26 +
src/backend/tsearch/dicts/hunspell_sample_num.dict | 8 +
src/backend/tsearch/dicts/ispell_sample.affix | 26 +
src/backend/tsearch/dicts/ispell_sample.dict | 8 +
src/backend/tsearch/dicts/synonym_sample.syn | 5 +
src/backend/tsearch/dicts/thesaurus_sample.ths | 17 +
src/backend/tsearch/hunspell_sample.affix | 24 -
src/backend/tsearch/ispell_sample.affix | 26 -
src/backend/tsearch/ispell_sample.dict | 8 -
src/backend/tsearch/spell.c | 611 ++++++++++++++++++---
src/backend/tsearch/synonym_sample.syn | 5 -
src/backend/tsearch/thesaurus_sample.ths | 17 -
src/include/tsearch/dicts/spell.h | 51 +-
src/test/regress/expected/tsdicts.out | 234 ++++++++
src/test/regress/sql/tsdicts.sql | 64 +++
20 files changed, 1183 insertions(+), 169 deletions(-)