Merge RFC4 (#1865)

This commit is the result of the squashing of rfc4_dev branch in a single
commit. It implements mostly RFC 4 related work.

* Grid handling:
  - remove obsolete and presumably unfinished implementation of grid catalog functionality
  - all grid functionality is in grids.cpp/.hpp
  - vertical and horizontal grid shift: rework to no longer load whole grid into memory
  - remove hgrids and vgrids member from PJ structure, and store them in hgridshift/vgridshift/deformation structures
  - build systems: add optional libtiff dependency. Must be explicitly disabled if not desired
  - add support for horizontal and vertical grids in GeoTIFF, if libtiff is available
  - add GenericShiftGridSet and GenericShiftGrid classes, relying on TIFF grids, that can be used for generic purpose grid-based adjustment
  - add a +proj=xyzgridshift method to perform geocentric translation by grid. Used for French NTF to RGF93 transformation using gr3df97a.tif grid
  - deformation: add support for +grids= for GeoTIFF grids
  - horizontal grid shift: fix failures on points slightly outside a subgrid (fixes #209)

* File management:
  - add a filemanager.cpp/.hpp to deal with file related work
  - test for legacy proj_api.h fileapi
  - proj.h: add proj_context_set_fileapi() and proj_context_set_sqlite3_vfs_name() (fixes #866)
  - add capability to read resource files from the user writable directory

* Network access:
  - build systems: add optional curl dependency
  - add a curl-based default implementation for network related functionality
  - proj.h: add C API to control network functionality, and optionaly provide network callbacks
  - add data/proj.ini with default settings
  - add a SQLite3 local cache of downloaded chunks
  - add proj_is_download_needed() and proj_download_file()

* Use Win32 Unicode APIs and expect all strings to be UTF-8 (fixes #1765)
  For backward compatibility, if PROJ_LIB content is found to be not UTF-8 or
  pointing to a non existing directory, then an attempt at interpretating it
  in the ANSI page encoding is done.
  proj_context_set_search_paths() now assumes strings to be in UTF-8, and
  functions returning paths will also return values in UTF-8.

1 files changed, 17 insertions, 17 deletions

diff --git a/test/gigs/Makefile.am b/test/gigs/Makefile.am
index a66052db..436a6e89 100644
--- a/test/gigs/Makefile.am
+++ b/test/gigs/Makefile.am
@@ -23,54 +23,54 @@ EXTRA_DIST = \
 PROJ_LIB ?= ../../data/for_tests
 
 5101.1: 5101.1-jhs.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5101.2: 5101.2-jhs.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5101.3: 5101.3-jhs.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5101.4: 5101.4-jhs-etmerc.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5102.1: 5102.1.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5103.1: 5103.1.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5103.2: 5103.2.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5103.3: 5103.3.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5105.2: 5105.2.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5106: 5106.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5107: 5107.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5109: 5109.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5111.1: 5111.1.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5112: 5112.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5113: 5113.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5201: 5201.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 5208: 5208.gie
-	PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
+	PROJ_SKIP_READ_USER_WRITABLE_DIRECTORY=YES PROJ_LIB=$(PROJ_LIB) $(GIEEXE) $<
 
 check-local: 5101.1 5101.2 5101.3 5101.4 5102.1 5103.1 5103.2 5103.3 5105.2 5106 5107 5109 5111.1 5112 5113 5201 5208