name tracking for constants underway (not yet finished)

Rev: src/docode.c:1.51
Rev: src/interpreter.h:1.13
Rev: src/language.yacc:1.123
Rev: src/las.c:1.88
Rev: src/lex.c:1.66
Rev: src/object.c:1.82
Rev: src/object.h:1.29
Rev: src/pike_types.h:1.21
Rev: src/program.c:1.151
Rev: src/program.h:1.59
Rev: src/program_areas.h:1.6
Rev: src/testsuite.in:1.197