libc versioning: Add missing symbols, put rest in DFprivate_1_0

This builds, like the previous attempt, but all executables that pull in
libc segfault when errno is accessed, so libc versioning is n

libc versioning: Add missing symbols, put rest in DFprivate_1_0

This builds, like the previous attempt, but all executables that pull in
libc segfault when errno is accessed, so libc versioning is not working.

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libc version maps: Update inactive symbol maps

This is a work in progress, but it is encouraging that a full buildworld
completed with a versioned libc. This will not be activated until it is
verif

libc version maps: Update inactive symbol maps

This is a work in progress, but it is encouraging that a full buildworld
completed with a versioned libc. This will not be activated until it is
verified with a complete bulk run of packages.

show more ...

libc/nmalloc: fix a mistake in previous commit

libc/nmalloc: add an integer overflow check to calloc