[PostGIS] #6044: winnie failing make check because of docbook xml validate errors

[PostGIS]

#6044: winnie failing make check because of docbook xml validate errors
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  Reporter:  robe     |      Owner:  robe
      Type:  defect   |     Status:  closed
  Priority:  blocker  |  Milestone:  PostGIS 3.3.9
 Component:  install  |    Version:  3.3.x
Resolution:  fixed    |   Keywords:
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Comment (by Darafei Praliaskouski <me@…>):

 In [changeset:"90bffa836de30479221808f6bf39f53f6df0b6b9/git" 90bffa8/git]:
 {{{#!CommitTicketReference repository="git"
 revision="90bffa836de30479221808f6bf39f53f6df0b6b9"
 Skip XML checks without DocBook XSL on stable-3.3

 Backport the 3.4 Winnie/doc check guard so check-unit does not run check-
 xml when XSLBASE is unset.

 Closes #6044 for PostGIS 3.3.11

 (cherry picked from commit 30b1d54dac01f0f4cb92ba6ba47ecd5bb5ce3e69)
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6044#comment:4>
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