Fix error wiki url.
Merge pull request #245 from yeasy/master

Fix error wiki url.
Depend: add dnsmasq (needed), remove landscape-client (not)
fixing CLI host rewriting when host's default interface does not have an IP
2.1.0 -> 2.1.0+
Fix regex to support Mininet 20.30.40+++
Minor codecheck fixes
2.1.0p1