Feature request - knocking

**Is your feature request related to a problem? Please describe.**
Add feature to client, to enable port knocking before client conenct.

**Describe the solution you'd like**
To have advances field under HA url setup where user can enter knock sequence.
Sequence could be for example: 15001:tcp, 0,5s: 10010:tcp, 0,5s: 15000:udp

App send packet to port 15001 using TCP, then wait 0.5 second, send packet to 10010:tcp, wait 0.5 second, sedn UDP packet to port 15000
**Describe alternatives you've considered, if any**
No other alternative

**Additional context**
This could enhance security layer for advance users. Knocking can be setup on many routers and hides port 8123 fo all not knocking users. Hides publis shared home assistent so scanners can see it.