Problem: the warning about missing clipboard can be improved
(after v9.1.0852)
Solution: use different warnings depending on whether or not clipboard
support is included in Vim, update related documentation
Improve the Warnings about missing clipboard registers
- Make it translatable
- Use a different warning, when clipboard support was not compiled in
- add a reference to :h W24
- explain in more detail the error message
closes: #16069
Signed-off-by: Christian Brabandt <cb@256bit.org>