+20210102
+ + update man/curs_memleaks.3x, to include <term.h> which declares
+ exit_terminfo.
+ + clarify man/curs_terminfo.3x, to mention why the macro setterm is
+ defined in <curses.h>, and remove it from the list of prototypes
+ (prompted by patch by Graeme McCutcheon).
+ + amend man/curs_terminfo.3x, to note that <curses.h> is required
+ for certain functions, e.g., those using chtype or attr_t for
+ types, as well as mvcur (cf: 20201031).
+ + use parameter-names in prototypes in curs_sp_funcs.3x, for
+ consistency with other manpages.
+