🚀 go-pugleaf

Manifestation: Emacs (version 18.52.4) does not use insert
or delete character to update the display on terminals
with termcap entries "im" and "ei" but no "ic".  Adding
the blank "ic=" entry fixes the problem.

Fix: In term.c, the flag char_ins_del_ok is not computed correctly.
The lines

  char_ins_del_ok = ((TS_ins_char || TS_ins_multi_chars)
		     && (TS_del_char || TS_del_multi_chars));

should be

  char_ins_del_ok = ((TS_insert_mode || TS_ins_char || TS_ins_multi_chars)
		     && (TS_del_char || TS_del_multi_chars));

I don't think it is necessary to add TS_delete_mode, since "dc"
is required even with "dm" set (it doesn't make sense otherwise).
However, "ic" is not required when "im" is set.

This exists in all Emacs versions, but char_ins_del_ok is unused
until this version.