update README.md

Author: Bryce Larson

README.md

@@ -8,6 +8,9 @@ This was created from compiling sshguard 1.7.1 from source from sshguard.sourcef
 and I used some of the files in the ubuntu version 1.6.0 to make it auto-start and configure
 iptables.
 
+This should work on any redhat like distribution that is using systemd.  I make no guarantees
+that this won't mess up your machine, but I run it on mine and it seems to work well.
+
 To install:
 ```
 rpm -i https://github.com/bryceml/sshguard-rhel7/raw/master/RPMS/x86_64/sshguard-1.7.1-1.el7.x86_64.rpm