[kde-freebsd] x11/kdelibs4 build fails

[Bartosz Fabianowski]

I ran into the exactly same problem a couple of days ago. For me, it was
caused by ftp/curl:

/usr/local/bin/onto2vocabularyclass expects to find a plugin that can
handle trig files. That plugin links against libcurl. When the c-ares
shlib version was incremented a few days ago, the PORTREVISION of
ftp/curl was not bumped, causing libcurl to be linked against a stale,
now nonexistent libcares.so.2.

I manually changed the LIB_DEPENDS in ftp/curl from cares.2 to cares.3,
reinstalled ftp/curl and the build error in x11/kdelibs4 went away.
Since the ftp/curl port has actually been fixed since, you should be
able to fix the error even easier, by updating ftp/curl to the newest
revision.

- Bartosz