sys/netinet/cc: Switch from deprecated random() to prng32()

[hhartzer]

Related: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277655

Signed-off-by: [email protected]

[hhartzer]

Hoping that someone with familiarity of these components can review this. I feel like it looks like an innocent enough set of changes, but I don't want to get something wrong here.

[gmshake]

CC @tuexen

[bsdimp]

Also cc @cemeyer @amotin @markjdb

These seem fine, but it looks like the range is changing for these (the range is accounted for, but I want more eyes on it).

[hhartzer]

I can update this but would prefer a little bit more guidance about how exactly it should be done, if that's possible.

[bsdimp]

@amotin I think @hhartzer needs some help with your suggestion