Sync peers FQDN (#584)

Use stdout and stderr log path only if on Linux and attempt to create the path

Update status system with FQDN fields and 
status command to display the domain names of remote and local peers

Set some DNS logs to tracing

update readme file

README.md

@@ -1,5 +1,5 @@
 <p align="center">
- <strong>:hatching_chick: New Release! User Invites.</strong>
+ <strong>:hatching_chick: New Release! DNS support.</strong>
   <a href="https://github.com/netbirdio/netbird/releases">
        Learn more
      </a>   
@@ -55,9 +55,9 @@ NetBird uses [NAT traversal techniques](https://en.wikipedia.org/wiki/Interactiv
 - \[x] Access Controls - groups & rules.
 - \[x] Remote SSH access without managing SSH keys.
 - \[x] Network Routes.  
+- \[x] Private DNS.
 
 **Coming soon:**
--  \[ ] Private DNS.
 -  \[ ] Mobile clients.
 -  \[ ] Network Activity Monitoring.