import dwm-mitch release 3.8.1

you will get:

 - changes/improvements:
   - statusbar
     - change workspace via mousewheel
     - change layout via mousewheel
     - change focus via mousewheel or click
     - change volume via mousewheel on rightmost part,
       see new options in config.def.h
   - workspace warping:
     - honor warpmouserel() offset properly on wraparound,
       don't cling to first/last screen 
     - mouse pointer is warped relative to screen size,
       useful when changing between screens with different orientation

 - bugfixes:
   - change sigchld handler to prevent zombies
   - fix border calculation for
     - maximization of floating windows
     - master window position in tileleft layout
   - fix off-by-one error in warpmouse bounding code
   - fix deprecation warning for XKeycodeToKeysym during build