Add bunch of missing includes of namespace.h in libc

The NetBSD Standard C Library uses internally some of its functions with
a mangled symbol name, usually "_symbol". The internal functions shall n

Add bunch of missing includes of namespace.h in libc

The NetBSD Standard C Library uses internally some of its functions with
a mangled symbol name, usually "_symbol". The internal functions shall not
use the global (public) symbols.

This change eliminates usage of the global changes of the following symbols:
- strlcat -> _strlcat
- sysconf -> __sysconf
- closedir -> _closedir
- fparseln -> _fparseln
- kill -> _kill
- mkstemp -> _mkstemp
- reallocarr -> _reallocarr
- strcasecmp -> _strcasecmp
- strncasecmp -> _strncasecmp
- strptime -> _strptime
- strtok_r -> _strtok_r
- sysctl -> _sysctl
- dlopen -> __dlopen
- dlclose -> __dlclose
- dlsym -> __dlsym

Sponsored by <The NetBSD Foundation>

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Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

__STDC__ is always defined on NetBSD.

merge lite-2

Fix RCSID's

First pass at getting a clean compile with "gcc -Wall", mostly explictly
declaring function return values, etc.

Declare rcsid strings so they are stored in text segment.

Add RCS identifiers.

initial import of 386bsd-0.1 sources