find: added options for multiple search criteria and empty files
find: added options for multiple search criteria and empty files

mshmoustafa/tldr,AgamAgarwal/tldr,slash3b/tldr,slash3b/tldr,AgamAgarwal/tldr,felixonmars/tldr,felixonmars/tldr,katekyan/tldr,cptdeka10/tldr,kuanyui/tldr,deekim/tldr,katekyan/tldr,Phizho/tldr,UncommonPleb/tldr,mshmoustafa/tldr,UncommonPleb/tldr,rubenvereecken/tldr,zoisom/tldr,igorshubovych/tldr,cptdeka10/tldr,deekim/tldr,UncommonPleb/tldr,slash3b/tldr,cptdeka10/tldr,katekyan/tldr,WALL-E/tldr,igorshubovych/tldr,kuanyui/tldr,WALL-E/tldr,Phizho/tldr,zoisom/tldr,rubenvereecken/tldr,felixonmars/tldr,deekim/tldr,zoisom/tldr,Phizho/tldr