libpcp_web: query.c missing break statements, cleanup
libpcp_web: query.c missing break statements, cleanup

Coverity picked up some cases of switch statements with
missing break clauses.  Minor code consistency cleanup,
making new code more in the pre-existing style.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp