doc: correct livepatch.markdown syntax

doc: correct livepatch.markdown syntax

"make -C docs all" fails due to incorrect markdown syntax in
livepatch.markdown. Correct it.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Misc fixes:
 * Insert real URLs
 * Drop trailing whitespace
 * Consistent alignment and indentation for code blocks and lists
 * Consistent capitalisation
 * Consistent use of `` blocks for command line arguments and function names
 * Rearrange things not to leave &lt; and &gt; in the text

No change in content.  The document now reads rather more consistently in HTML
and PDF form.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>