ncurses 6.1 - patch 20190126

ncurses 6.1 - patch 20190126

+ change some "%define" statements in test-packages for RPMs to
  "%global" to work around changes in rpm 4.14 from recent Redhat.
+ fixes for O_INPUT_FIELD extension (patch by Leon Winter).
+ eliminate fixed buffer-size when reading $TERMCAP variable.
+ correct logic in read_entry.c which prevented $TERMCAP variable from
  being interpreted as a fallback to terminfo entry (prompted by
  Savannah #54556, cf: 20110924).