libmisc/isexpired.c, src/groupadd.c, lib/pwauth.h, lib/groupmem.c, lib/shadowmem.c, lib/pwmem.c, lib/prototypes.h: Added splint annotations.
Files with no license use the default 3-clauses BSD license. The copyright were mostly not recorded; they were updated according to the Changelog. "Julianne Frances Haugh and contributors" changed to "copyright holders and contributors".
