Search Appliance SBE
Syntax: select Yes or No button
If Yes, then the walk process will look for Host: newsite.com
directives in `robots.txt`. If one is found, and the host listed there is
different than the host it was launched on, it will save that pair as a new
Host Alias (see above), and convert the content.
For example, if your Base URL is https://www.oldsite.com, and the contents
of `https://www.oldsite.com/robots.txt contains the line
Host: www.newsite.com
Then a Host Alias will automatically be created, from the alias host
www.oldsite.com to the canonical host www.newsite.com, and then
https://www.newsite.com will then be indexed.