[url rewriting] fix nasty bug in build_rset inner function: the same dictionary is used by all queries, hence triggering potentially important bugs on concurrent requests (this dictionary goes back and forth the repository)

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*