Log Message:
x11/xterm: update to 361

Patch #361 - 2020/10/14

-treat the return value of strerror as readonly (patch by Philipp Klaus Krause).
-modify event-handling in CopyWait to work around hanging while writing large
amounts of text to an active icon and at the same time iconifying/deiconifying
(report by Dave Kemper).
-initialize double-buffer for active-icon window.
-improve manual page description of scrollbar resources
(report by Brian Lindholm).
-correct ifdef for menu entry for active-icon, when initializing it with toolbar
configuration.
-add preprocessor option to makefile to set internal definition of pixmaps
directory to match the install-configuration (FreeBSD #250036).
-cleanup of calls to free, removing checks for null (Walter Harms).
-add fallback actions pointer-button and pointer-motion which handle events for
the mouse control-sequences protocol if the select-related translations are
omitted with *omitTranslation:select (prompted by discussion with "Ergus")
-amend rule for using shift-key to override mouse-