Added all items from CIS Section 7 Levels 1 & 2

https://benchmarks.cisecurity.org/tools2/ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.0.0.pdf
Why not loop through `net.ipv4.conf.all.send_redirects` and `net.ipv4.conf.default.send_redirects` in a single task?