Update security to use openssl version 3.*

[gonzoleeman]

The current WITH_SECURITY code was designed quite a while ago, and it gets many warnings when compiling with modern (3.*) openssl versions, like:

[```
32/62] cc -Ilibisns.so.0.p -I. -I.. -Iinclude -I../include -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -std=gnu99 -O3 -D_GNU_SOURCE -fPIC -DOPENSSL_LOAD_CONF -MD -MQ libisns.so.0.p/pki.c.o -MF libisns.so.0.p/pki.c.o.d -o libisns.so.0.p/pki.c.o -c ../pki.c
../pki.c: In function ‘isns_dsasig_report_errors’:
../pki.c:154:4: warning: ‘ERR_func_error_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
ERR_func_error_string(code),
^~~~~~~~~~~~~~~~~~~~~
In file included from ../pki.c:16:0:
/usr/include/openssl/err.h:459:35: note: declared here
OSSL_DEPRECATEDIN_3_0 const char *ERR_func_error_string(unsigned long e);
^~~~~~~~~~~~~~~~~~~~~

The code needs to migrate to openssl 3 or newer. I fear this might break some older distros though?

Anyone?