Apparently, breakpoints and watchpoints are practically disabled if
run with OPcache JIT under Windows, so we mark the affected tests as
xfail in that case for the time being.
PHP requires integer typehints to be written "int" and does not
allow "integer" as an alias. This changes type error messages to
match the actual type name and avoids confusing messages like
"must be of the type integer, integer given".
