Have cryptocheck toggle kern.cryptodevallowsoft as needed

[sef]

Summary

If '-d soft' is given, have it set kern.cryptodevallowsoft to 1 if needed (and use atexit to set it back to 0 if that's how it started out).

I did not set up any signal handlers, however.

Test Plan

sysctl kern.cryptodevallowsoft
sudo cryptocheck -A 0 -a aes-gcm -d soft 100
sysctl kern.cryptodevallowsoft

[cem]

Seems unobjectionable to me. Ok by you, John?

tools/tools/crypto/cryptocheck.c

114–129 ↗

(On Diff #54440)

sys/ includes sort to the top; sys/types.h is redundant due to sys/param.h, per style(9).

[sef]

tools/tools/crypto/cryptocheck.c

114–129 ↗

(On Diff #54440)

Ok, but that's straight out of the man page for sysctlbyname(3).

[sef]

Move the #includes around per cem.

[jhb]

tools/tools/crypto/cryptocheck.c

129 ↗

(On Diff #54442)

Extra blank line is a minor nit.

293 ↗

(On Diff #54442)

Maybe call this 'enable_user_soft' instead of 'check'.

[sef]

tools/tools/crypto/cryptocheck.c

129 ↗

(On Diff #54442)

Ah, caused by when I move the <sys/> line around. Fixed :).

[sef]

Feedback from jhb. (Just uploaded for completeness sake; I'll be checking it in after I update my svn source, apply the patch, and do a buildworld just to make sure I didn't do anything stupid again.)