This commit removed functions/events that have been deprecated in Bro
2.6. It also removes the detection code that checks if the old
communication framework is used (since all the functions that are
checked were removed).
Addresses parts of GH-243
Without this patch, this scenario results in a segmentation fault.
I opted to keep the separator present for non-existing elements. Hence,
a vector a, [empty], b with separator "|" will result in
a||b
