Deprecate java_debug, java_convert_matrix, java_unsigned_conversion. Replace with debug_java, java_matrix_autoconversion, java_unsigned_autoconversion. * libinterp/octave-value/ov-java.h: Rename Vjava_debug, Vjava_unsigned_conversion, Vjava_convert_matrix to Vdebug_java, Vjava_unsigned_autoconversion, Vjava_matrix_autoconversion. * libinterp/octave-value/ov-java.cc(Fjava_debug, Fjava_unsigned_conversion, Fjava_convert_matrix): Rename functions to match variables in ov-java.h. Improve docstrings. * scripts/deprecated/module.mk: Add java_debug.m, java_convert_matrix.m, java_unsigned_conversion.m files to build system. * scripts/deprecated/java_convert_matrix.m: New m-file for deprecated function. * scripts/deprecated/java_debug.m: New m-file for deprecated function. * scripts/deprecated/java_unsigned_conversion.m: New m-file for deprecated function.