Merge branch 'curve448' into master

.gitignore

ChangeLog

Makefile.in

configure.ac

curve448-eh-to-x.c

curve448-mul-g.c

curve448-mul.c

curve448.h

ecc-448.c

ecc-add-eh.c

ecc-add-ehh.c

ecc-dup-eh.c

ecc-internal.h

ecc-point-mul-g.c

ecc-point-mul.c

ecc-point.c

eccdata.c

ecdsa-keygen.c

examples/ecc-benchmark.c

nettle.texinfo