Follow-up to r4797, simplify implementation a bit and update inline documentation for the Image macro: add `link` argument and deprecate the `nolink` one.
Follow-up to r4797, simplify implementation a bit and update inline documentation for the Image macro: add `link` argument and deprecate the `nolink` one.

git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@4798 af82e41b-90c4-0310-8c96-b1721e28e2e2

dokipen/trac,exocad/exotrac,moreati/trac-gitsvn,moreati/trac-gitsvn,dokipen/trac,dafrito/trac-mirror,moreati/trac-gitsvn,exocad/exotrac,exocad/exotrac,dokipen/trac,exocad/exotrac,dafrito/trac-mirror,dafrito/trac-mirror,moreati/trac-gitsvn,dafrito/trac-mirror