pgsql: Use a file of patterns of filenames to exclude from pgindent

Log Message:
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Use a file of patterns of filenames to exclude from pgindent runs, instead if using multiple invocations of egrep. Add perl ppport.h to the current list.

Modified Files:
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pgsql/src/tools/pgindent:
README (r1.39 -> r1.40)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/pgindent/README?r1=1.39&r2=1.40)

Added Files:
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pgsql/src/tools/pgindent:
exclude_file_patterns (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/pgindent/exclude_file_patterns?rev=1.1&content-type=text/x-cvsweb-markup)