Log Message:
x11/xterm: update to 379

Patch #379 - 2023/02/15
 - improve text-cursor (patch by Jan Engelhardt):
     - allow selecting CURSOR_BAR mode from command-line/Xresources.
     - draw cursor using filled rectangle instead of rectangle outline to
       permit thicker underlines/bars.
     - scale up cursor relative to font size.
 - improve readline modes (Fedora #2166860):
     - document readline modes
     - change the feature to configure by default
     - replace hard-coded SS3 for cursor movement with current mode
     - replace hard-coded erase/lnext characters with current values
 - improve status-line (report by Thomas Wolff):
     - RIS turns off status-line
     - Right-margin (DECLRMM and DECSLRM) limits the length of text
       written/updated in the status-line.
     - Most controls which affect the whole screen are ignored while updating
       the status-line.
 - modify configure check for tgetent to allow for some special cases of
   ncurses configuration (report by Satadru Pramani).
 - reduce timeout, improve warning message if resize is run on a terminal which
   is not VT100-compatible.
 - reduce compiler warnings in configure script.

Thanks to @wiz for help with initial build failure.