mail/dovecot2 doesn't detect libstemmer or exttextcat
Wanting to try out the FTS plugin in dovecot2, found that it was failing to find libstemmer/exttextcat libraries.
textproc/libexttextcat has incremented its library name, so
configure has trouble finding it.
libextextcat has gone from:
libextextcat.so(.*) -> libextextcat-1.0.so(.*) -> libextextcat-2.0.so(.*)
As for libstemmer, this is present in lib-clucene-contribs-lib.so from
textproc/clucene, so patched the configure & code to look for it from there.