src/libpcp_web/src/query.c: some OpenBSD 6.7 changes
src/libpcp_web/src/query.c: some OpenBSD 6.7 changes

1. avoid // ...'... as the compiler here is a bit lame and complains
   about unmatched quotes, but fortunately /* ...'... */ is fine.
2. when sscanf'ing a pmAtomValue with the ll or ull member, use
   PRId64 or PRIu64 as the format specifier

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