Create tag 6.3.1

Amend NEWS with new SQLite version requirement (3.11)

Create tag 6.2.1

Create tag 6.2.0

Create tag 6.1.1

Create tag 6.1.0

Fix build issues on Solaris

Create tag 5.2.0

Merge remote-tracking branch 'osgeo/master'

bump man3 version numbers