Improve documentation for frontend rules.
Improve documentation for frontend rules.

Includes guidelines on proper usage of the more complex path matchers.

mmatur/traefik,seryl/traefik,vdemeester/traefik,kekoav/traefik,timoreimann/traefik,mmatur/traefik,containous/traefik,vholovko/traefik,atbore-phx/traefik,kekoav/traefik,dtomcej/traefik,vholovko/traefik,nmengin/traefik,marco-jantke/traefik,bparli/traefik,Regner/traefik,mvdstam/traefik,mvdstam/traefik,vdemeester/traefik,tanyadegurechaff/traefik,bparli/traefik,mildis/traefik,adityacs/traefik,containous/traefik,simbas/traefik,adityacs/traefik,containous/traefik,mihaitodor/traefik,seryl/traefik,simbas/traefik,nmengin/traefik,mihaitodor/traefik,FriggaHel/traefik,mildis/traefik,ldez/traefik,FriggaHel/traefik,martinbaillie/traefik,tanyadegurechaff/traefik,atbore-phx/traefik,Regner/traefik,jangie/traefik,simbas/traefik,SantoDE/traefik,mmatur/traefik,aantono/traefik,thomasbach76/traefik,kekoav/traefik,mihaitodor/traefik,dtomcej/traefik,vdemeester/traefik,yyekhlef/traefik,ldez/traefik,vholovko/traefik,mvdstam/traefik,mvdstam/traefik,ldez/traefik,martinbaillie/traefik,martinbaillie/traefik,nmengin/traefik,tanyadegurechaff/traefik,EmileVauge/traefik,SantoDE/traefik,containous/traefik,vdemeester/traefik,Regner/traefik,simbas/traefik,mmatur/traefik,Regner/traefik,martinbaillie/traefik,thomasbach76/traefik,adityacs/traefik,thomasbach76/traefik,seryl/traefik,vholovko/traefik,atbore-phx/traefik,mildis/traefik,jangie/traefik,marco-jantke/traefik,dtomcej/traefik,mildis/traefik,tanyadegurechaff/traefik,adityacs/traefik,bparli/traefik,seryl/traefik,dtomcej/traefik,yyekhlef/traefik,aantono/traefik,EmileVauge/traefik,kekoav/traefik,timoreimann/traefik,jangie/traefik,aantono/traefik,timoreimann/traefik,aantono/traefik,yyekhlef/traefik,SantoDE/traefik,FriggaHel/traefik,aantono/traefik,thomasbach76/traefik,EmileVauge/traefik,marco-jantke/traefik,atbore-phx/traefik,marco-jantke/traefik,SantoDE/traefik,EmileVauge/traefik,yyekhlef/traefik,bparli/traefik,mihaitodor/traefik,ldez/traefik,timoreimann/traefik,jangie/traefik,nmengin/traefik,FriggaHel/traefik