[MacPorts] #71521: libgsasl: update to 2.x

[MacPorts]

#71521: libgsasl: update to 2.x
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 Reporter:  barracuda156  |      Owner:  ryandesign
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.5
 Keywords:                |       Port:  libgsasl
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 `libgsasl` is at 1.10.0, while upstream version is at 2.2.1. Any special
 reason to hold back? GNU software is usually okay with backward
 compatibility, it will probably work for all supported versions.

 It seems that an archaic `libgsasl` creates issues with updating
 dependents: https://github.com/marlam/msmtp/issues/182

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Ticket URL: <https://trac.macports.org/ticket/71521>
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