[MacPorts] #42246: lftp updated to @4.4.15

[MacPorts]

#42246: lftp updated to @4.4.15
----------------------------+--------------------------------
 Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.2.1
 Keywords:                  |       Port:  lftp
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 Version 4.4.15 - 2014-01-21

 new setting pget:min-chunk-size.
 improved DHT search by preferring responded nodes.
 allow UTC timezone in http timestamps.
 fixed WebDAV rmdir operation.
 fixed torrent hang on shutdown when a tracker is unresposive.
 fixed adding too many slashes to URLs in http.

 Version 4.4.14 - 2013-12-13

 fixed HEAD/PROPFIND handling in http.
 a minor memory leak fixed.

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Ticket URL: <https://trac.macports.org/ticket/42246>
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