Обсуждение: pgsql: Add some rudimentary tracing code to the default text search

Log Message:
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Add some rudimentary tracing code to the default text search parser, to help
in debugging its state-machine rules.  Const-ify all the constant tables.
Minor other code cleanup, including using "token" rather than "lexeme" to
describe the output strings.

Modified Files:
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    pgsql/src/backend/tsearch:
        wparser_def.c (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/wparser_def.c?r1=1.5&r2=1.6)