[MacPorts] #43733: openslide: use "github.tarball_from releases"

[MacPorts]

#43733: openslide: use "github.tarball_from releases"
---------------------------+------------------------
  Reporter:  ryandesign@…  |      Owner:  bgilbert@…
      Type:  enhancement   |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.2.99
Resolution:  fixed         |   Keywords:  haspatch
      Port:  openslide     |
---------------------------+------------------------
Changes (by ryandesign@…):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 r120236

-- 
Ticket URL: <https://trac.macports.org/ticket/43733#comment:2>
MacPorts <http://www.macports.org/>
Ports system for OS X