adconrad@nosferatu:~$ grep-dctrl -sPackage -wFProvides httpd /var/lib/apt/lists/*Packages | sort -uPackage: aolserver4-core
Package: aolserver4-daemon
Package: apache2
Package: apache2-mpm-prefork
Package: apache2-mpm-worker
Package: ebhttpd
Package: lighttpd
Package: micro-httpd
Package: mini-httpd
Package: nginx-core
Package: nginx-extras
Package: nginx-full
Package: nginx-light
Package: ocsigenserver
Package: tntnet
Package: webfs
Package: yaws