The bitmap and image handling interfaces have changed within NetSurf
and the webp image handling has not been fixed up appropriately to
cope.
After discussion with the other developers it has been decided that
the webp support is not worth the necessary development effort to
rewrite and maintain.
The webp format is not in wide usage and Mozilla, Microsoft and Apple
have not adopted it. This means the removal will not adversely impact
NetSurf.
Resolves:2310
Despite the fact AmigaOS filesystems run as separate processes,
DOS filesystem writes occur synchronously waiting for the disk
write to finish before returning. Here we have effectively taken
the core's fs backing store and extended it slightly so the store
operation is spun off into a new process, running at a lower task
priority than NetSurf itself. This stops the UI pauses that occur
shortly after loading pages as NetSurf commits the cache to disk.
Somewhat experimental, pending more extensive user testing.
