Fix plist for CAPIDOCS option after update to doxygen.

PR:		194712
Reported by:	Trond Endrestol <Trond.Endrestol@ximalas.info>


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372322 35697150-7ecd-e111-bb59-0022644237b5