Log Message:
xterm: update to 366.

Patch #366 - 2021/02/10

    correct a compiler-warning fix in patch #352 which allowed sign-extension of \ 
coordinate values (report by "CismonX").
    correct upper-limit for selection buffer, accounting for combining \ 
characters (report/testcase by Tavis Ormandy).
    with alwaysHighlight true, xterm does not properly track focus. The \ 
screen->select FOCUS flag remains always on, which prevents bellIsUrgent from \ 
working, as the urgent WM_HINT flag is only set in setXUrgency() when the window \ 
is not focused. Fix this by updating screen->select in unselectwindow() \ 
regardless of the value of always_highlight (patch by Jiri Bohac).
    improve fix for interaction between SRM and ENQ (report by Grant Taylor).
    build-fix for --with-Xaw3dxft, needed when --with-toolbar is omitted (report \ 
by Jimmy Olgeni, Emanuel Haupt).