* libc/argz: New directory.
* libc/argz/*: New files.
* libc/argz/argz_add.c: New file.
* libc/argz/argz_add_sep.c: New file.
* libc/argz/argz_append.c: New file.
* libc/argz/argz_count.c: New file.
* libc/argz/argz_create.c: New file.
* libc/argz/argz_create_sep.c: New file.
* libc/argz/argz_delete.c: New file.
* libc/argz/argz_extract.c: New file.
* libc/argz/argz_insert.c: New file.
* libc/argz/argz_next.c: New file.
* libc/argz/argz_replace.c: New file.
* libc/argz/argz_stringify.c: New file.
* libc/argz/buf_findstr.c: New file.
* libc/argz/envz_add.c: New file.
* libc/argz/envz_entry.c: New file.
* libc/argz/envz_get.c: New file.
* libc/argz/envz_merge.c: New file.
* libc/argz/envz_remove.c: New file.
* libc/argz/envz_strip.c: New file.
* libc/include/argz.h: New file.
* libc/include/envz.h: New file.
* Makefile.am (LIBC_OBJECTLISTS): Add
libc/argz/objectlist.awk.in.
* libc/Makefile.am (SUBDIRS): Add argz.
(SUBLIBS): Add argz/libargz.la.
* libc/configure.in (AC_OUTPUT): Add argz/Makefile.
* libc/include/errno.h: Add error_t typedef.
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