xterm* terminfo entries missing in terminfo.src

[Sven Joachim]

There are some xterm* terminfo entries which are distributed with xterm,
but not with ncurses (and vice versa, but that is currently not really
interesting to me).

,----
| $ tic -x xterm-snapshots/terminfo -o /tmp/xterm
| $ tic -x ncurses-snapshots/misc/terminfo.src -o /tmp/ncurses
| $ comm -23 <(cd /tmp/xterm/x; ls) <(cd /tmp/ncurses/x; ls)
| xterm+app+pc
| xterm+decedit
| xterm+noapp+pc
| xterm+pce0
| xterm+pce1
| xterm+pce3
| xterm+pcf1
| xterm+pcf3
| xterm+pcfN
| xterm+pcfn
| xterm-65
| xterm-boldso
| xterm-ic
| xterm-mono
| xterm-nrc
| xterm-rep
| xterm-vi
| xterm-xmc
`----

Some background: Debian has, at least for the last 21 years, compiled
its xterm* terminfo files from the (slightly modified) xterm source,
rather than from ncurses' terminfo.misc.  As Debian maintainer I
consider that a bug and would like to change it, but this is quite
difficult when xterm-mono is missing, since we are currently shipping
xterm-mono in ncurses-base.

What is the reason for this discrepancy between xterm and ncurses?

Cheers,
       Sven