Log Message:
tex-changebar{,-doc}: update to 3.6c

3.6c
I was made aware of a situation where an extra page with lots of "spsp"
 would appear at the end of a lengthy document.

 This has now been fixed

3.6b
Several years ago Apostolos Syropoulos sent me an extension to support
XeTeX. I integrated it into changebar, but unfortunately I seem to have
never gotten round to upload that version.