webapp/sagews: when rewriting img src, always be absolute! -- issue #1417
webapp/sagews: when rewriting img src, always be absolute! -- issue #1417

tscholl2/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,sagemathinc/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,DrXyzzy/smc,sagemathinc/smc