Log Message:
xlogo: update to 1.0.7.

Alan Coopersmith (10):
      Print which arguments were unknown before giving usage message
      Add -help and -version options
      Mark Syntax() with noreturn attribute
      Clear up 17 -Wunused-parameter warnings from clang 13
      Fix -Wextra-semi-stmt from donestr() macro
      Use struct initializers
      Handle -Wsign-compare warning in Syntax()
      Add -help and -version to man page and usage output
      Fix up copyright & license notices in COPYING & xlogo.c
      xlogo 1.0.7