/usr/share/aide/config/aide/aide.conf.d/31_aide_libapache2-mod-fastcgi is in aide-common 0.16~a2.git20130520-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | /var/lib/apache2/fcgid/sock$ VarDir
!/var/lib/apache2/fcgid/sock/[0-9]{5}\.[0-9]$
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