[postgis-tickets] [PostGIS] #3384: Patch up docs reflect 9.1 is not supported in 2.3

[PostGIS]

#3384: Patch up  docs reflect 9.1 is not supported in 2.3
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 Reporter:  robe           |      Owner:  robe
     Type:  defect         |     Status:  new
 Priority:  medium         |  Milestone:  PostGIS 2.3.0
Component:  documentation  |    Version:  trunk
 Keywords:                 |
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 Since PostgreSQL 9.1, is going to reach EOL probably before 2.3 release,
 it's time to kill it as noted in

 https://lists.osgeo.org/pipermail/postgis-devel/2015-November/025480.html

 Couple of things need changing, some for 2.2 as well

 1)  our header in docs says if compiling with less than 9.1 (that header
 should be changed to compiling without raster support) since now it's only
 relevant if you are compiling with raster support.

 http://postgis.net/docs/manual-2.2/postgis_installation.html#create_new_db

 This should really read without extension support (no raster)

 So it's clearer to folks installing wo raster that they need to use these
 instructions.

 2) Need to update minimum requirements in docs


 We should start looking thru our code, to see what stuff we can leverage
 that is only supported in 9.2+ and take out any ifDEF stuff targetting <
 9.2.  That can be saved for later as a separate ticket.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3384>
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