* remove js from some headers
 * set coding:utf-8 to allow real names in headers

 * Remove some licencing problems
 * To do: same for images
 * See #4200

we have that in all files. To at least lesser the confusion a bit, add
vim tags for that.
Additionally, fix wrong #! in a few files.

YES, it CAN happen that we had caps and now got a presence without!
And that WILL happen very often, for example if the other end signs
off!

Quick fix: What does not exist cannot support anything. Fixes #4031.
Fix variable referencing. Fixes #4076.

implementing a later coming fallback to disco rather easy.