Thank you for answering Sean. Yes, the module exists and simply reversing the symlink to nsd8x all went good:
[02/Dec/2001:16:35:34][5031.1024][-main-] Notice: modload: loading '/usr/lib/postgres.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: PostgreSQL loaded.
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: adp: mapped /*.adp
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nssock.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nslog.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: nslog: opened '/var/log/aolserver/defaultacs.log'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nsperm.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nssha1.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nscache.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: nscache module version @VER@
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nsrewrite.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: modload: loading '/usr/lib/nsxml.so'
[02/Dec/2001:16:35:35][5031.1024][-main-] Notice: nsxml module starting
Claudio Pasolini