LU-930 docs: fix whatis output

LU-930 docs: fix whatis output

The ".SH NAME" section has to be formatted in a certain
way for whatis and apropos to work correctly. Otherwise,
users will just see "(unknown subject)".

This patch fixes issues for all man pages.

Add a couple of one-line man page redirects.

Lustre-change: https://review.whamcloud.com/50264
Lustre-commit: 17bbf5bdd6f96f61dc0e39924dce540e91e1422c

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ie11eb921c84ff9ad19b50973c616f6fb6df1f461
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/53474
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>