Update NEWS to 6.3.1

NEWS

@@ -1,3 +1,65 @@
+6.3.1 Release Notes
+-------------------
+
+ Updates
+ -------
+
+ o Update the EPSG database to version 9.8.6
+
+ o Database: add mapping for gg10_smv2.mnt and gg10_sbv2.mnt French grids
+
+ o Database: add mapping for TOR27CSv1.GSB
+
+ Bug fixes
+ ---------
+
+ o Fix wrong use of derivingConversionRef() that caused issues with use of
+   +init=epsg:XXXX by GDAL (affecting R spatial libraries) or in MapServer
+
+ o fix exporting CoordinateSystem to PROJ JSON with ID
+
+ o projinfo: use No. abbreviation instead of UTF-8 character (#1828)
+
+ o CompoundCRS::identify(): avoid exception when horiz/vertical part is a
+   BoundCRS
+
+ o createOperations(): fix dealing with projected 3D CRS whose Z units != metre
+
+ o WKT1_GDAL export: limit datum name massaging to names matching EPSG (#1835)
+
+ o unitconvert with mjd time format: avoid potential integer overflow
+  (ossfuzz 20072)
+
+ o ProjectedCRS::identify(): fix wrong identification of some ESRI WKT linked
+   to units
+
+ o Database: add a geoid_like value for proj_method column of grid_alternatives,
+   fix related entries and simplify/robustify logic to deal with EPSG
+   'Geographic3D to GravityRelatedHeight' methods
+
+ o Fix ingestion of +proj=cea with +k_0 (#1881)
+
+ o Fix performance issue, affecting PROJ.4 string generation of EPSG:7842
+   (#1913)
+
+ o Fix identification of ESRI-style datum names starting with D_ but without
+   alias (#1911)
+
+ o cart: Avoid discontinuity at poles in the inverse case (#1906)
+
+ o Various updates to make regression test suite pass with gcc on i386 (#1906)
+
+ THANKS TO
+ ---------
+
+ Alan D. Snow
+ GitHub user @russkel
+ Gerrit Holl
+ Anshul Singhvi
+ Raven Kopelman
+ Kristian Evers
+ Even Rouault
+
 6.3.0 Release Notes
 -------------------