Using QNX Neutrino 6.5.0, I notice that there is a new libsocket version, libsocket.so.3, in addition to libsocket.so.2

However, a simple test shows that linking against "-lsocket" will include both libsocket.so.2 _and_ libsocket.so.3:
13:22:22-dspadaro@EXV2:~/builds/tot/source/configurations/QNX-PPC/test/ppc/be> ntoppc-strings test | grep lib.*\.so
/usr/lib/ldqnx.so.2
libsocket.so.3
libc.so.3
libsocket.so.2  

I guess I was assuming that when the version number incremented the functionality would be a superset.  It would be nice
 if we did not have to carry forward 2 versions of this library.  Does anyone know of a trick (or a reason not) to do 
this?