pgsql: Change text search parsing rules for hyphenated words so that

Log Message:
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Change text search parsing rules for hyphenated words so that digit strings
containing decimal points aren't considered part of a hyphenated word.
Sync the hyphenated-word lookahead states with the subsequent part-by-part
reparsing states so that we don't get different answers about how much text
is part of the hyphenated word. Per my gripe of a few days ago.

Modified Files:
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pgsql/src/backend/tsearch:
wparser_def.c (r1.6 -> r1.7)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/wparser_def.c?r1=1.6&r2=1.7)
pgsql/src/test/regress/expected:
tsearch.out (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/tsearch.out?r1=1.7&r2=1.8)