Switch back to autoconf 2.57
Switch back to autoconf 2.57

nightrune/ola,nightrune/ola,nightrune/ola,ld3300/ola,ld3300/ola,nightrune/ola,ld3300/ola,ld3300/ola,nightrune/ola,nightrune/ola,nightrune/ola,ld3300/ola,ld3300/ola,ld3300/ola