ncurses 5.6 - patch 20070901

ncurses 5.6 - patch 20070901

+ remove a spurious newline from output of html.m4, which caused links
  for Ada95 html to be incorrect for the files generated using m4.
+ start investigating mutex's for SCREEN manipulation (incomplete).
+ minor cleanup of codes.c/names.c for --enable-const
+ expand/revise "Routine and Argument Names" section of ncurses manpage
  to address report by David Givens in newsgroup discussion.
+ fix interaction between --without-progs/--with-termcap configure
  options (report by Michail Vidiassov).
+ fix typo in "--disable-relink" option (report by Michail Vidiassov).