make README for non-tls ports more readable

Author: haipdev

README.md

@@ -20,15 +20,23 @@ go run ./cmd/snmp-proxy
 
 By default the service listens on `https://localhost:8443`.
 
-To use port `8080` with TLS enabled:
+To run HTTP on the default non-TLS port:
 
 ```bash
 SNMP_PROXY_BASIC_AUTH_USERNAME=user \
 SNMP_PROXY_BASIC_AUTH_PASSWORD=pass \
-SNMP_PROXY_LISTEN_ADDRESS=:8080 \
+SNMP_PROXY_TLS_ENABLED=false \
 go run ./cmd/snmp-proxy
 ```
 
+To enable TLS on any custom port, use the TLS flag with the listen-address flag:
+
+```bash
+SNMP_PROXY_BASIC_AUTH_USERNAME=user \
+SNMP_PROXY_BASIC_AUTH_PASSWORD=pass \
+go run ./cmd/snmp-proxy -tls-enabled=true -listen-address=:9443
+```
+
 ## Docker
 
 ```bash

SPEC.md

@@ -416,7 +416,7 @@ Periodic stats should include at least:
 
 | Variable | Default | Requirement |
 | --- | --- | --- |
-| `SNMP_PROXY_TLS_ENABLED` | `true` | boolean |
+| `SNMP_PROXY_TLS_ENABLED` | `true` | boolean; controls HTTP vs HTTPS independently of port |
 | `SNMP_PROXY_LISTEN_ADDRESS` | `:8443` with TLS, else `:8080` | valid listen address |
 | `SNMP_PROXY_TLS_CERT_PATH` | `certs/server.crt` | path |
 | `SNMP_PROXY_TLS_KEY_PATH` | `certs/server.key` | path |