Don't overwrite existing $WEP_OPTS
Don't overwrite existing $WEP_OPTS

Signed-off-by: Jim Pryor <b16fc8032c62c78b71c32827550f0de1fcbdf807@jimpryor.net>

GNU-Pony/netcfg,Finkregh/netcfg-vlan,GNU-Pony/netcfg,Finkregh/netcfg-vlan,iphitus/netcfg-updates,jlyo/netcfg,rubyists/netcfg2,somenxavier/netcfg,somenxavier/netcfg