homebrewパッケージにインストールされているすべてのファイルを一覧表示するにはどうすればよいですか？たとえばbrew list、eximパッケージを実行すると、次のファイルが表示されます。
$ brew list exim
/usr/local/Cellar/exim/4.80.1/bin/exiwhat
/usr/local/Cellar/exim/4.80.1/bin/exiqsumm
/usr/local/Cellar/exim/4.80.1/bin/exiqgrep
/usr/local/Cellar/exim/4.80.1/bin/exipick
/usr/local/Cellar/exim/4.80.1/bin/exinext
/usr/local/Cellar/exim/4.80.1/bin/eximstats
/usr/local/Cellar/exim/4.80.1/bin/exim_tidydb
/usr/local/Cellar/exim/4.80.1/bin/exim_lock
/usr/local/Cellar/exim/4.80.1/bin/exim_fixdb
/usr/local/Cellar/exim/4.80.1/bin/exim_dumpdb
/usr/local/Cellar/exim/4.80.1/bin/exim_dbmbuild
/usr/local/Cellar/exim/4.80.1/bin/exim_ctl
/usr/local/Cellar/exim/4.80.1/bin/exim_checkaccess
/usr/local/Cellar/exim/4.80.1/bin/exim-4.80.1-3
/usr/local/Cellar/exim/4.80.1/bin/exim
/usr/local/Cellar/exim/4.80.1/bin/exigrep
/usr/local/Cellar/exim/4.80.1/bin/exicyclog
/usr/local/Cellar/exim/4.80.1/share/man/man8/exim.8
しかし、上記のリストにないファイルがシステムに追加されています。例えば：
$ ls -ld /usr/local/etc/exim.conf
-rw-r--r-- 1 hanxue admin 35904 Sep 25 21:11 /usr/local/etc/exim.conf