-fix for tcl-expressions in message catalogs (see
http://openacs.org/forums/message-view?message_id=4185876) This must be most likely quite an old bug, since many packages
use unescaped square brackets in message strings, some packages
such as evaluation have even tcl code there. strangely, there is
no bug-report for this, seems as if the contract-filters
"string_length" and "range" are not widely used.
- bump version number