ncurses 5.7 - patch 20100731

ncurses 5.7 - patch 20100731

+ modify initialization check for win32con driver to eliminate need for
  special case for TERM "unknown", using terminal database if available
  (prompted by discussion with Roumen Petrov).
+ for MinGW port, ensure that terminal driver is setup if tgetent()
  is called (patch by Roumen Petrov).
+ document tabs "-0" and "-8" options in manpage.
+ fix Debian "lintian" issues with manpages reported in
  http://lintian.debian.org/full/csmall@debian.org.html#ncurses