[libknet] bump soname due to ABI changes introduced in e153606

soname 2.0.0 will stay around till stable2 is branched.
followers of the master branch should know what they are dealing with.

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>

libknet/Makefile.am

@@ -18,7 +18,7 @@ EXTRA_DIST		= $(SYMFILE)
 SUBDIRS			= . tests
 
 # https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-libversion		= 2:0:1
+libversion		= 2:0:0
 
 # override global LIBS that pulls in lots of craft we don't need here
 LIBS			=