+ fix some cppcheck warnings, mostly style, in ncurses library and
progs directory.
+ improve description of BSD-style padding in curs_termcap.3x
+ improved CF_C11_NORETURN macro, from byacc changes.
+ fix "--enable-leak" in CF_DISABLE_LEAKS to allow turning
leak-checking off later in a set of options.
+ relax modification-time comparison in CF_LINK_FUNCS to allow it to
accept link() function with NFS filesystems which change the mtime
on the link target, e.g., several BSD systems.
+ call delay_output_sp to handle BSD-style padding when tputs_sp is
called, whether directly or internally, to ensure that the SCREEN
pointer is passed correctly (reports by Henric Jungheim, Juraj
Lutter).