Add update to NEWS.md for fixing key_t name collision.
Add update to NEWS.md for fixing key_t name collision.

dbaarda/librsync,sourcefrog/librsync,sourcefrog/librsync,dbaarda/librsync,sourcefrog/librsync,librsync/librsync,sourcefrog/librsync,dbaarda/librsync,librsync/librsync,librsync/librsync,librsync/librsync,dbaarda/librsync