Consider renaming "editline" references to "libedit"

[lanodan]

There is a slightly unrelated project called editline¹², which seems to be from Minix. While mrsh refers to libedit³, which seems to be from NetBSD.
I think I'm not the only one which got a bit confused when packaging mrsh and seeing editline being an actual thing.

Footnotes

1. https://troglobit.com/projects/editline/ ↩

2. https://repology.org/project/editline-troglobit/versions ↩

3. https://repology.org/project/libedit/information ↩

[emersion]

Sounds like a good idea.