Davical has RDEPEND="... www-servers/apache" however, Apache is not strictly necessary, it's recommended but not required.
Confirmed.
Created attachment 331386 [details] New ebuild with virtual/httpd-php dependancy.
Created attachment 331388 [details] Re-added the (mistakenly stripped) awl library to the RDEPEND
Can someone commit the ebuild and close this bug and #438742
+ 28 Jan 2013; Patrick Lauer <patrick@gentoo.org> +davical-1.1.1-r1.ebuild: + Dep fix for #445604