In preparation for the future format 29 format bump: Add checksum refcount triggers to the externals table and enable the trigger WHEN clauses for the NODES triggers. (A change that will also be applied in format 29).
In preparation for the future format 29 format bump: Add checksum refcount
triggers to the externals table and enable the trigger WHEN clauses for
the NODES triggers. (A change that will also be applied in format 29).

* subversion/libsvn_wc/wc-metadata.sql
  (STMT_CREATE_NODES_TRIGGERS): Remove comment from when clauses.
  (STMT_CREATE_EXTERNALS): Add 3 triggers.
  (STMT_UPGRADE_TO_29): Also update the 2 other triggers.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion