Feature request: since ql:quickload accepts a string designator, ql:uninstall (and others?) should too

[lmj]

I was bitten by this a couple times.

(ql:quickload :alexandria)  ; => (:alexandria)
(ql:uninstall :alexandria)  ; => NIL
(ql:uninstall "alexandria") ; => T

There may be a reason for this behavior, but it seems inconsistent to me.

[scymtym]

I was bitten by the same issue for quicklisp-client:who-depends-on.