Include the IPv4/IPv6 prefix if it's set.

Signed-off-by: Robert Vogelgesang <[email protected]>

diff -u lxc-lxc-1.0.0.beta2/src/lxc/confile.c.writeprefix 
lxc-lxc-1.0.0.beta2/src/lxc/confile.c
--- lxc-lxc-1.0.0.beta2/src/lxc/confile.c.writeprefix   2014-01-16 
01:07:33.000000000 +0100
+++ lxc-lxc-1.0.0.beta2/src/lxc/confile.c       2014-01-20 18:20:16.616979009 
+0100
@@ -2267,7 +2267,11 @@
                        struct lxc_inetdev *i = it2->elem;
                        char buf[INET_ADDRSTRLEN];
                        inet_ntop(AF_INET, &i->addr, buf, sizeof(buf));
-                       fprintf(fout, "lxc.network.ipv4 = %s\n", buf);
+                       if (i->prefix)
+                               fprintf(fout, "lxc.network.ipv4 = %s/%d\n",
+                                       buf, i->prefix);
+                       else
+                               fprintf(fout, "lxc.network.ipv4 = %s\n", buf);
                }
                if (n->ipv6_gateway_auto)
                        fprintf(fout, "lxc.network.ipv6.gateway = auto\n");
@@ -2280,7 +2284,11 @@
                        struct lxc_inet6dev *i = it2->elem;
                        char buf[INET6_ADDRSTRLEN];
                        inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf));
-                       fprintf(fout, "lxc.network.ipv6 = %s\n", buf);
+                       if (i->prefix)
+                               fprintf(fout, "lxc.network.ipv6 = %s/%d\n",
+                                       buf, i->prefix);
+                       else
+                               fprintf(fout, "lxc.network.ipv6 = %s\n", buf);
                }
        }
        lxc_list_for_each(it, &c->caps)
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