Perl: removed special environment handling for the perl module. In Perl 5.8.6 the default was switched to use putenv() when used as embedded library unless "PL_use_safe_putenv = 0" is explicitly used in the code. Therefore, for modern versions of Perl it is no longer necessary to restore previous environment when calling perl_destruct().

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  1
#endif

END