Reduce code repetition

bin/ffoom.in

     lsfun)              lsfun "$2";                     exit $? ;;
     -d|--debug)         FFOO_DEBUG=true;                shift   ;;
     --version)          version_info;                   exit 0  ;;
-    --version-major)    version_info major;             exit 0  ;;
-    --version-minor)    version_info minor;             exit 0  ;;
-    --version-patch)    version_info patch;             exit 0  ;;
-    --version-semver)   version_info semver;            exit 0  ;;
+    --version-*)        version_info "${2:10}";         exit 0  ;;
     "") usage ;;
 esac done