[Icons] Icons removed in FontAwesome 5 are wrong

[NoisyFlake]

Some icons that were removed in FontAwesome 5 but were kept for compatibility reasons point to the wrong icons. Example:

i.icon.resize.horizontal has content: "\f337" which correlates to i.icon.envelope.open.outline.
Instead it shoud point to the new i.icon.arrows.alternate.horizontal which has content: "\f697".

Other classes I found that point to the wrong icon:

cloud.download
cloud.upload
disk.outline
exchange
heart.empty
hourglass.zero
protect
resize.horizontal
resize.vertical
star.empty

The rest seems to be mostly fine (or as good as possible as not every old icon has a fitting replacement).

[rtarnaud]

The icons i.icon.arrows.alternate.horizontal and i.icon.arrows.alternate.vertical do not seem to work in 2.3.0. They indeed point to the right values (\f337 and \f338 respectively) according to the FA5 cheatsheet. Any idea why?

[NoisyFlake]

@rtarnaud: This is already fixed in v2.3.1 (which is deployed to the docs page), but it's not officially released yet.

[stale]

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