[Bro-Dev] #757: Change split* to return a string_vec rather string_array

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#757: Change split* to return a string_vec rather string_array
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 Reporter:  matthias  |      Owner:
     Type:  Problem   |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  Bro       |    Version:  git/master
 Keywords:  language  |
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 Currently, ``split`` and friends return a ``string_array``, which is a
 ``table[count] of string``. However, these BiFs should return a
 ``string_vec`` or ``vector of string`` to allow for sequential iteration
 over the result. The problem with the current approach is not only that it
 is wrong modeled (the associative container does not make sense), but also
 that iteration over the elements, which are obviously ordered, is neither
 deterministic nor sequential. Presumably this mismatch exists because
 vectors were not available when the ``split*`` functions have been
 created.

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Ticket URL: <http://tracker.bro-ids.org/bro/ticket/757>
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