More clean up

[Bruce Dubbs]

From lfs-dev:

6.6. Creating Essential Files and Symlinks

In the "The purpose of each link" list, there's no description for

/usr/bin/env

In that same section, the description for blkid, lzma, mount, uuid references the three forms of library {a,la,so*}, but the commands only link the "so*" form of each utility.

I notice in Chapter 5, the section

Libstdc++ from GCC-8.2.0

and wanted to suggest that in Chapter 6, future books might say

Libelf from Elfutils-0.173

[Bruce Dubbs]

Fixed at revision 11472.