ncurses 6.1 - patch 20180929

ncurses 6.1 - patch 20180929

+ fix typo in tvi955 -TD
+ corrected acsc for regent60 -TD
+ add alias n7900 -TD
+ corrected acsc for tvi950 -TD
+ remove bogus kf0 from tvi950 -TD
+ added function-key definitions to agree with Televideo 950 manual -TD
+ add bel to tvi950 -TD
+ add shifted function-keys to regent60 -TD
+ renumber regent40 function-keys to match manual -TD
+ add cd (clr_eos) to adds200 -TD