uci/lua: add explicit close() method
authorDirk Feytons <dirk.feytons@gmail.com>
Thu, 29 Sep 2016 15:39:57 +0000 (17:39 +0200)
committerJohn Crispin <john@phrozen.org>
Thu, 27 Oct 2016 10:37:23 +0000 (12:37 +0200)
This allows a caller to explicitly free the cursor as soon as it is
no longer needed instead of having to wait for the garbage collector.

Signed-off-by: Dirk Feytons <dirk.feytons@gmail.com>

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