Uclibc does not have crypt_r


#1

Hi,
in src/os/unix/ngx_linux_config.h you assume that linux always has
crypt_r().

It is not true, only glibc has crypt_r.
I attach a patch that add an auto/feature check to find when you have
crypt_t
function.

The patch work also on 0.7.43 version