#1377 Update Debug Assertions

[Baptiste Wicht]

Hi,

This simple patch avoids Warning log "AgentX session to master agent attempted to be reopened" by updating the debug assertions. Also, it actually stops the connection timers if the connection already exists.

NET-SNMP version: master
OS: FreeBSD 11

Thanks for your consideration

[G Viswanath Deepak]

Is there a plan to consider this path?

[Baptiste Wicht]

It would be great if this would be considered.