ncurses 6.0 - patch 20160611

ncurses 6.0 - patch 20160611

+ revise fix for Debian #805618 (report by Vlado Potisk, cf: 20151128).
+ modify test/ncurses.c a/A screens to make exiting on an escape
  character depend on the start of keypad and timeout modes, to allow
  better testing of function-keys.
+ modify rs1 for xterm-16color, xterm-88color and xterm-256color to
  reset palette using "oc" string as in linux -TD
+ use ANSI reply for u8 in xterm-new, to reflect vt220-style responses
  that could be returned -TD
+ added a few capabilities fixed in recent vte -TD