ncurses 6.0 - patch 20161126

ncurses 6.0 - patch 20161126

+ modify linux-16color to not mask dim, standout or reverse with the
  ncv capability -TD
+ add 0.1sec mandatory delay to flash capabilities using the VT100
  reverse-video control -TD
+ omit selection of ISO-8859-1 for G0 in enacs capability from linux2.6
  entry, to avoid conflict with the user-defined mapping.  The reset
  feature will use ISO-8859-1 in any case (Mikulas Patocka).
+ improve check in tic for delays by also warning about beep/flash
  when a delay is not embedded, or if those use the VT100 reverse
  video escape without using a delay.
+ minor fix for syntax-check of delays from 20161119 changes.
+ modify trace() to avoid overwriting existing file (report by Maor
  Shwartz).