Improved "release" and "available" make(1) targets.
Mentioned that the development version of libxml2 is necessary.
Added "--with-noaaport" and "--with-gribinsert" to "distcheck" target.
Removed html/tutorial/tutorial/* from git(1) repository.
v6.11.6.1
Removed extraneous "libxml2" references.
Removed bundled zlib package.

The bundled zlib library was in the LDM shared-library and the system
xml2 library references the system zlib library. Different versions of
the library cause crashes.
Added "-I$(top_srcdir)/rpc".
Changed "zlib/zlib.h" to "zlib.h".
Changed '"zlib.h"' to '<zlib.h>'.
Added "-I$(top_srcdir)" to obtain bundled <rpc/rpc.h>.
Changes necessary for "make remote-checks".

Added definition of _DARWIN_C_SOURCE, when appropriate, to obtain
"struct ip_mreq" on that system.
Don't define "union semun" if _DARWIN_C_SOURCE is defined.
"make remote-checks" changes. Mostly installing zlib.
Changed "c89" requirement to "c99" & added "xml2" and "zlib".
Added "test/results.tab" to repository.
v6.11.6.2
More release work.

Added icon file.
Created autoconf(1) macro for finding libxml2 and zlib headers.
More work on RPM spec-file.
Added more porting hosts.
v6.11.6.3