aptitude why apache2-bin
i   gnome-user-share Suggests apache2-bin (>= 2.4)

apt-cache rdepends apache2-bin
apache2-bin
Reverse Depends:
  apache2
  apache2-suexec-pristine
  apache2-suexec-custom
  libapache2-mod-apparmor
  apache2-dbg
  apache2
  libapache2-mod-svn
  apache2-suexec-pristine
  apache2-suexec-custom
  libapache2-mod-php7.0
  libapache2-mod-auth-pgsql
  libapache2-mod-apparmor
  apache2-dbg
  libapache2-mod-apparmor
  mate-user-share
  mahimahi
  libapache2-mpm-itk
  libapache2-mod-wsgi-py3
  libapache2-mod-webkdc
  libapache2-mod-webauthldap
  libapache2-mod-webauth
  libapache2-mod-svn
  libapache2-mod-rivet
  libapache2-mod-r-base
  libapache2-mod-qos
  libapache2-mod-passenger
  libapache2-mod-nss
  libapache2-mod-netcgi-apache
  libapache2-mod-neko
  libapache2-mod-musicindex
  libapache2-mod-mono
  libapache2-mod-log-sql-ssl
  libapache2-mod-log-sql-mysql
  libapache2-mod-log-sql-dbi
  libapache2-mod-log-sql
  libapache2-mod-jk
  libapache2-mod-gnutls
  libapache2-mod-dacs
  libapache2-mod-authnz-pam
  libapache2-mod-auth-radius
  libapache2-mod-auth-mellon
  libapache2-mod-auth-gssapi
  libapache2-mod-apreq2
  gridsite
  apache2-suexec-pristine
  apache2-suexec-custom
  libapache2-mod-wsgi
  libapache2-mod-php7.0
  libapache2-mod-perl2
  apache2
  gnome-user-share
  apache2-dbg