/usr/share/perl5/auto/LWP/Authen/Negotiate/autosplit.ix is in liblwp-authen-negotiate-perl 0.08-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Index created by AutoSplit for blib/lib/LWP/Authen/Negotiate.pm
# (file acts as timestamp)
1;
|