This is a set of changes to support symlink protection detection.

In addition this fixes some detection of cagefs. This adds the capability
to detect vanilla redhat derivative distro protections as well as protections
provided by grsecurity and cloudlinux. This includes mod_ruid2 detection,
Apache level patch provided protections, and kernel level protections.
Merge branch 'symlink_prot' of https://github.com/cpdans/addon_securityadvisor
Correctly identify and report the current running kernel version.

Case 85597:
Correctly identify and report the current running kernel version.
Correctly identify and report debug and custom kernels.
Recommend checking grub.conf if the newest kernel does not load on
boot.

Case 82785:
Do not suggest using Update System Software to update the kernel.