Tidying a couple of issues from my absence
Use new latest/product5.0 redirects across the board
Merge pull request #942 from hflynn/rebased/dev_5_0/sysadmin-VM

Tidying a couple of sysadmin docs issues from my absence (rebased onto dev_5_0)
Merge pull request #945 from sbesson/latest_redirect_5.0

Use new latest/product5.0 redirects across the board
Make Ice 3.5.1 default version
Merge pull request #946 from hflynn/rebased/dev_5_0/ice-version

Make Ice 3.5.1 default version (rebased onto dev_5_0)