Add fieldnames.m which extensds fieldnames() to work on Java objects. Deprecate javafields. Rename old C++ fieldnames to __fieldnames__. * scripts/deprecated/javafields.m: Moved from scripts/java. Added deprecated warning. * scripts/java/javafields.m: Moved to scripts/deprecated. * scripts/general/fieldnames.m: New m-file which accepts Java, structure, or Octave objects as inputs. * libinterp/octave-value/ov-struct.cc(Ffieldnames): Renamed fieldnames to __fieldnames__ to avoid class with fieldnames.m. * scripts/deprecated/module.mk: Added javafields to deprecated build. * scripts/general/module.mk: Added fieldnames.m to build. * scripts/java/module.mk: Removed javafields.m from build.

--- a/scripts/deprecated/module.mk
+++ b/scripts/deprecated/module.mk
@@ -7,6 +7,7 @@
   deprecated/cut.m \
   deprecated/error_text.m \
   deprecated/isstr.m \
+  deprecated/javafields.m \
   deprecated/java_get.m \
   deprecated/java_new.m \
   deprecated/java_set.m \