Merge branch 'topic/earlyfix'

Merge branch 'topic/earlyfix'

* topic/earlyfix:
  CXX peace: src/pre-grn/hgraph.cpp
  CXX peace: src/troff/input.cpp
  CXX peace: src/pre-eqn/pile.cpp
  file_case.{h,cpp}: wether->whether; 2017
  tmac/mdoc-syms: add a couple of entries (Anthony J.  Bentley)..
  man/l_roff-char.7.in: sprinkle *** (Dave Kemper)...
  man/l_roff-char.7.in: fix Bernd Warken (Dave Kemper, Werner Lemberg)..
  Bugfix: eqn: fix HTML entity (Brian McGuinness)..
  man/l_roff.7.in: .tm,.tm1 go to STDERR not STDOUT
  Bugfix: PS Name Objects are case-sensitive..
  Bugfix: src/dev-ps/ps.cc: fix format (Rich Burridge)..
  tmac/pspic.tmac: add -N (groff #50770)