cut down on redundant inclusions of <sys/types.h>, include it in proto.h
per DB's patch, and make a few more minor cosmetic cleanups


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1857 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
8 files changed