Allow filtration of image src URLs in wp-admin/
|Reported by:||mdawaffe||Owned by:|
For caching purposes, large multisites will probably want to serve static content from a single (or finite set of) domain(s) rather than from each blog's domain.
Attached uses admin_url() or includes_url() on most admin-side images.
The patch intentionally leaves out image src URLs hardcoded in install, upgrade, and maintenance pages where admin_url could (I suppose) not yet be working or may be broken.