archivers/ucl: Strip files, Add CONFLICTS (libucl)

- Strip installed binaries and libraries
- Add CONFLICTS against libucl
- Add LICENSE_FILE
- pkg-descr: Strip trailing-slash from WWW:


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373526 35697150-7ecd-e111-bb59-0022644237b5