Amend README for Gentoo and OpenRC stuff

README.md

@@ -30,7 +30,7 @@ osync uses pidlocks to prevent multiple concurrent sync processes on/to the same
 You may launch concurrent sync processes on the same system but as long as the replicas to synchronize are different.
 Multiple osync tasks may be launched sequentially by osync osync-batch tool.
 
-Currently, it has been tested on CentOS 5.x, 6.x, 7.x, Fedora 22-25, Debian 6-8, Linux Mint 14-18, Ubuntu 12.04-12.10, FreeBSD 8.3-11, Mac OS X and pfSense 2.3x.
+Currently, it has been tested on CentOS 5.x, 6.x, 7.x, Fedora 22-25, Debian 6-8, Linux Mint 14-18, Ubuntu 12.04-12.10, FreeBSD 8.3-11, Gentoo, Mac OS X and pfSense 2.3x.
 Microsoft Windows is supported via MSYS or Cygwin and now via Windows 10 bash.
 Android support works via busybox (tested on Termux).
 
@@ -168,6 +168,8 @@ Systemd specific (one service per config file)
 	$ systemctl start osync-srv@configfile.conf
 	$ systemctl enable osync-srv@configfile.conf
 
+OpenRC-specific instructions can be found in ``osync-srv-openrc``.
+
 Security enhancements
 ---------------------
 Remote SSH connection security can be improved by limiting what hostnames may connect, disabling some SSH options and using ssh filter.