xccdf rename sysctl_ipv4_all_send_redirects -> sysctl_net_ipv4_conf_all_send_redirects

Renamed to follow sysctl naming scheme. Alignment properly pulls in remediation now.
XCCDF rename, sysctl_ipv6_default_accept_redirects -> sysctl_net_ipv6_conf_default_accept_redirects

Renamed to follow sysctl naming standards. Change properly pulls in remediation content as well.
Merge pull request #26 from shawndwells/sysctl-fixes-20140820

Updating sysctl XCCDF naming