Correct size increase in SigGroupHeadStore()

The code was increasing the size of the allocated memory by 16, but
only increasing the stored size by 10. Now uses one variable for both
places.
Coding style cleanup in detect-modbus files.
Remove an unused define COUNTER_DETECT_ALERTS

The only place this exists in the code is when it is defined.
Don't write target.tvar.idx in DetectFlowintParse

Match functions should not be writing to the SigMatch context. So just use
a local variable instead.
Fix bug in DetectFlowintParse() - Assigning to both parts of a Union

sfd->target.value was always being set, even if the targettype was
not FLOWINT_TARGET_VAL. This would cause the tvar to be overwritten
with garbage data.
DetectFlowintData - remove unused idx in TargetVar.

The idx inside TargetVar inside DetectFlowintData is never used, so remove
it.
Update copyright year in detect-flowbits files.
lua:  in streaming api, indicate open/close

The SCStreamingBuffer call now also returns two booleans:
    data, data_open, data_close = SCStreamingBuffer()

The first indicates this is the first data of this type for this
TCP session or HTTP transaction.

The second indicates this is the last data.

Ticket #1317.
pfring: fixes memleaks

This fixes some memory leaks
Bug #1184