Corrected link to VMware KB article

Rather than replace the link wholesale, I have restored
that link and added a paragraph that better describes the
need for the procedure described in the second KB article
(Pursuant to Andreas's comment in the review).

Change-Id: Ie1cc385254f726a37f01caaaceb531ad5c31ec91
backport: havana
Closes-Bug: #1259666
Merge "Corrected link to VMware KB article"