documentation: header/footer edits do not require restart

Since 2.1.1 we don't require a restart to load a new header or
footer file.  These are refreshed on each request.

Change-Id: I4f55c6a561a530a91160bdf9b7d44375cfcf8ecc
Signed-off-by: Shawn O. Pearce <sop@google.com>
1 file changed