Log Message:
Update to 2.4.4

PostGIS 2.4.4
2018/04/08

 * Bug fixes *
  - #3055, [raster] ST_Clip() on a raster without band crashes the server
          (Regina Obe)
  - #3942, geojson: Do not include private header for json-c >= 0.13
           (Björn Esser)
  - #3952, ST_Transform fails in parallel mode (Paul Ramsey)
  - #3978, Fix KNN when upgrading from 2.1 or older (Sandro Santilli)
  - #4003, lwpoly_construct_circle: Avoid division by zero (Raúl Marín Rodríguez)
  - #4004, Avoid memory exhaustion when building a btree index (Edmund Horner)
  - #4016, proj 5.0.0 support (Raúl Marín Rodríguez)
  - #4017, lwgeom lexer memory corruption (Peter E)
  - #4020, Casting from box3d to geometry now returns correctly connected
           PolyhedralSurface (Matthias Bay)
  - #4025, #4032 Incorrect answers for temporally "almost overlapping" \ 
ranges
           (Paul Ramsey, Darafei Praliaskouski)
  - #4052, schema qualify several functions in geography (Regina Obe)
  - #4055, ST_ClusterIntersecting drops SRID (Daniel Baston)

 * Enhancements *
  - #3946, Compile support for PgSQL 11 (Paul Ramsey)
  - #3992, Use PKG_PROG_PKG_CONFIG macro from pkg.m4 to detect pkg-config
           (Bas Couwenberg)
  - #4044, Upgrade support for PgSQL 11 (Regina Obe)