[postgis-tickets] [PostGIS] #3204: Migrate travis builds to container architecture

[PostGIS]

#3204: Migrate travis builds to container architecture
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  Reporter:  strk       |      Owner:  robe
      Type:  task       |     Status:  new
  Priority:  medium     |  Milestone:  PostGIS Future
 Component:  buildbots  |    Version:  2.1.x
Resolution:             |   Keywords:  travis
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Changes (by strk):

 * version:   => 2.1.x


Comment:

 Involves removing use of "sudo" from .travis.yml, which in turn requires
 fixing --prefix (see #635)

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3204#comment:3>
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