* libc/stdlib/getenv.c: Delete "char *_findenv_r ();", as is not a
proper prototype, and is properly prototyped in stdlib.h, anyway.
* libc/stdlib/getenv_r.c: Ditto.
* libc/search/hash.c: Add _DEFUN to __hash_open() declaration; add
#define __DBINTERFACE_PRIVATE to activate prototypes from db_local.h.
* libc/search/db_local.h: Correct __hash_open() prototype.
* libc/sys/linux/cmath/math_private.h: Eliminate compiler warnings:
Remove #define INFINITY (redefines from math.h); remove #define __isnanf
and #define __isinff isinff.
* libc/include/machine/setjmp-dj.h: With DJ Delorie's permission,
changed the copyright information to allow free modification of the
file with no reference to "copying.dj".
* libc/include/sys/stat-dj.h: Ditto.
* libc/machine/i386/setjmp.S: Ditto.
* libc/sys/h8300hms/sys/file.h: Ditto.
* libc/sys/sysmec/access.c: Ditto.
* libc/sys/sysnecv850/access.c: Ditto.
* libc/stdio/mktemp.c: Fixed typo for the word copyright.
* libc/stdlib/getenv_r.c: Ditto.
* libc/stdlib/putenv_r.c: Ditto.
* libc/stdlib/setenv_r.c: Ditto.
* libc/stdlib/getenv.c: Removed DJ reference since any possible
modifications will now be in the _r version of this file.
* libc/stdlib/putenv.c: Ditto.
* libc/stdlib/setenv.c: Ditto.
* libc/sys/go32/copying.dj: Removed DJ's address which is no longer
valid. Added a reference to DJ's web page that contains his address.
* libc/sys/go32/*.s: Removed references to DJ's old address.
* libc/sys/go32/*.c: Ditto.
* libc/sys/go32/*.h: Ditto.
* libc/sys/go32/*.S: Ditto.
* libc/sys/go32/sys/*.h: Ditto.
