bug#51386: 29.0.50; fido-vertical-mode: ssh host completion

[Gregory Heytings]

> Agreed. Should be fixed first.

I don't know what kind of fix you expect, but FTR with my patch everyting 
works as expected with the following completion-styles:

(basic partial-completion emacs22) ;; default
(initials basic)
(flex basic)
(substring basic)

Without, only the two first work as expected.