lftp: add cmd:diff prerequire (#6919)
lftp: add cmd:diff prerequire (#6919)


haikuports/haikuports,haikuports/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports,Begasus/haikuports,Begasus/haikuports,haikuports/haikuports,haikuports/haikuports,Begasus/haikuports