Merge pull request #1078 from dwalton76/ospfd-network-cmd-warning

*: return CMD_WARNING if command was already configured

diff --cc babeld/babel_interface.c
Simple merge

diff --cc eigrpd/eigrp_vty.c
Simple merge

diff --cc ospfd/ospf_vty.c
Simple merge

diff --cc ripd/ripd.c
Simple merge

diff --cc ripngd/ripngd.c
Simple merge