memset is C89 and 4.3BSD

src/acconfig.h

src/array.c

src/backend.cmod

src/block_alloc.h

src/builtin.cmod

src/builtin_functions.c

src/code/ia32.c

src/compilation.h

src/configure.in

src/encode.c

src/error.c

src/fd_control.c

src/fdlib.c

src/fdlib.h

src/las.c

src/lexer.h

src/modules/CommonLog/clf.c

src/modules/Gz/zlibmod.c

src/modules/HTTPLoop/accept_and_parse.c

src/modules/HTTPLoop/log.c