postgresql-postgis: Update to 2.5.0

(Upstream also has news for beta and rc, and it's not clear if those
are additional or folded into the following.)

PostGIS 2.5.0
2018/09/23
WARNING: If compiling with PostgreSQL+JIT, LLVM >= 6 is required
Supported PostgreSQL versions for this release are:
PostgreSQL 9.4 - PostgreSQL 12 (in development)
GEOS >= 3.5

* New Features *
  - #1847, spgist 2d and 3d support for PG 11+
    (Esteban Zim叩nyi and Arthur Lesuisse from Universit辿 Libre de Bruxelles (ULB),
      Darafei Praliaskouski)
  - #4056, ST_FilterByM (Nicklas Av辿n)
  - #4050, ST_ChaikinSmoothing (Nicklas Av辿n)
  - #3989, ST_Buffer single sided option (Stephen Knox)
  - #3876, ST_Angle function (R辿mi Cura)
  - #3564, ST_LineInterpolatePoints (Dan Baston)
  - #3896, PostGIS_Extensions_Upgrade() (Regina Obe)
  - #3913, Upgrade when creating extension from unpackaged (Sandro Santilli)
  - #2256, _postgis_index_extent() for extent from index (Paul Ramsey)
  - #3176, Add ST_OrientedEnvelope (Dan Baston)
  - #4029, Add ST_QuantizeCoordinates (Dan Baston)
  - #4063, Optional false origin point for ST_Scale (Paul Ramsey)
  - #4082, Add ST_BandFileSize and ST_BandFileTimestamp,
          extend ST_BandMetadata (Even Rouault)
  - #2597, Add ST_Grayscale (Bborie Park)
  - #4007, Add ST_SetBandPath (Bborie Park)
  - #4008, Add ST_SetBandIndex (Bborie Park)

* Breaking Changes *
  - #4054, ST_SimplifyVW changed from > tolerance to >= tolerance
  - #3885, version number removed from address_standardize lib file
          (Regina Obe)
  - #3893, raster support functions can only be loaded in the same schema
          with core PostGIS functions. (Sandro Santilli)
  - #4035, remove dummy pgis_abs type from aggregate/collect routines.
          (Paul Ramsey)
  - #4069, drop support for GEOS < 3.5 and PostgreSQL < 9.4 (Regina Obe)
  - #4082, ST_BandMetaData extended to include filesize, timestamp (Even Rouault)

* Enhancements and Fixes*
  - Upgrade scripts from multiple old versions are now all symlinks
    to a single upgrade script (Sandro Santilli)
  - #3944, Update to EPSG register v9.2 (Even Rouault)
  - #3927, Parallel implementation of ST_AsMVT
  - #3925, Simplify geometry using map grid cell size before generating MVT
  - #3899, BTree sort order is now defined on collections of EMPTY and
          same-prefix geometries (Darafei Praliaskouski)
  - #3864, Performance improvement for sorting POINT geometries
          (Darafei Praliaskouski)
  - #3900, GCC warnings fixed, make -j is now working (Darafei Praliaskouski)
  - TopoGeo_addLinestring robustness improvements (Sandro Santilli)
    #1855, #1946, #3718, #3838
  - #3234, Do not accept EMPTY points as topology nodes (Sandro Santilli)
  - #1014, Hashable geometry, allowing direct use in CTE signatures (Paul Ramsey)
  - #3097, Really allow MULTILINESTRING blades in ST_Split() (Paul Ramsey)
  - #3942, geojson: Do not include private header for json-c >= 0.13 (Bj旦rn Esser)
  - #3954, ST_GeometricMedian now supports point weights (Darafei Praliaskouski)
  - #3965, #3971, #3977, #4071 ST_ClusterKMeans rewritten: better initialization,
          faster convergence, K=2 even faster (Darafei Praliaskouski)
  - #3982, ST_AsEncodedPolyline supports LINESTRING EMPTY and MULTIPOINT EMPTY
          (Darafei Praliaskouski)
  - #3986, ST_AsText now has second argument to limit decimal digits
          (Marc Ducobu, Darafei Praliaskouski)
  - #4020, Casting from box3d to geometry now returns correctly connected
          PolyhedralSurface (Matthias Bay)
  - #2508, ST_OffsetCurve now works with collections (Darafei Praliaskouski)
  - #4006, ST_GeomFromGeoJSON support for json and jsonb as input
          (Paul Ramsey, Regina Obe)
  - #4038, ST_Subdivide now selects pivot for geometry split that reuses input
          vertices. (Darafei Praliaskouski)
  - #4025, #4032 Fixed precision issue in ST_ClosestPointOfApproach,
          ST_DistanceCPA, and ST_CPAWithin (Paul Ramsey, Darafei Praliaskouski)
  - #4076, Reduce use of GEOS in topology implementation (Bj旦rn Harrtell)
  - #4080, Add external raster band index to ST_BandMetaData
  - Add Raster Tips section to Documentation for information about
    Raster behavior (e.g. Out-DB performance, maximum open files)
  - #4084: Fixed wrong code-comment regarding front/back of BOX3D (Matthias Bay)
  - #4060, #4094, PostgreSQL JIT support (Ra炭l Mar鱈n, Laurenz Albe)
  - #3960, ST_Centroid now uses lwgeom_centroid (Darafei Praliaskouski)
  - #4027, Remove duplicated code in lwgeom_geos (Darafei Praliaskouski,
          Daniel Baston)
  - #4115, Fix a bug that created MVTs with incorrect property values under
    parallel plans (Ra炭l Mar鱈n).
  - #4120, ST_AsMVTGeom: Clip using tile coordinates (Ra炭l Mar鱈n).
  - #4132, ST_Intersection on Raster now works without throwing TopologyException
          (Vin鱈cius A.B. Schmidt, Darafei Praliaskouski)
  - #4177, #4180 Support for PostgreSQL 12 dev branch (Laurenz Albe, Ra炭l Mar鱈n)
  - #4156, ST_ChaikinSmoothing: also smooth start/end point of
  polygon by default (Darafei Praliaskouski)

(gdt)