2.7.3 released December 16, 1999

- minor tuning
- cleanup of patterns and helpers
- cleanup of matchpat()
- attack and defense patterns moved from patterns.db/patterns2.db to
  new files attack.db and defense.db
- attack and defense patterns matched during make_worms()
- error message instead of segmentation fault when using -L without -l
- testmode output modified
- cleanup of ttsgf.c, ttsgf_read.c, and ttsgf_write.c
- improved configure detection of snprintf
- cleanup in Makefile.am and patterns/Makefile.am
- configure tests for gcc specific macro __FUNCTION__
- bugfix in sgf/Makefile.am
- in break_chain, removed stackp<depth contingency
- bug fix in break_chain2
- two calls to naive_ladder removed
- fixed two uses of DEPTH where depth was intended in reading.c
- FIXME's in reading.c addressed