Re: [libvirt] [PATCH] virsh: change output text words 'domain' and 'guest' to 'virtual machine'

This changes all occurrences of the words 'domain' and 'guest' in virsh output to 'virtual machine', plus some occurrences in comments, plus updates the man page and 'make check' tests to match. Some trivial typos and line lengths were fixed on the way through too. --- Until now we use the words 'virtual machine', 'guest' and 'domain' interchangeably in our discussions and documentation. 'virtual machine' seems to be the most common (and the standard term in our industry), whereas 'guest' is less common, and 'domain' seems to be a implementation legacy from Xen. Using 'virtual machine' here is easier on newbies, gives us a (useful) shorter abbreviation of 'vm', and brings us more into line with industry standards.