ncurses 6.1 - patch 20190907

+ add --with-ada-libname option and modify Ada95 configuration to
  allow renaming the "AdaCurses" library (prompted by proposed changes
  by Pascal Pignard).
+ modify configure script to distinguish gcc from icc and clang when
  the --enable-warnings option is not used, to avoid unnecessary
  warnings about unrecognized inline options (report by Sven Joachim).