Document proxy env var precedence

Signed-off-by: Jordan Christiansen <xordspar0@gmail.com>

docs/source/markdown/podman-create.1.md

@@ -1123,6 +1123,7 @@ Environment variables within containers can be set using multiple different opti
 Precedence order (later entries override earlier entries):
 
 - **--env-host** : Host environment of the process executing Podman is added.
+- **--http-proxy**: By default, several environment variables will be passed in from the host, such as **http_proxy** and **no_proxy**. See **--http-proxy** for details.
 - Container image : Any environment variables specified in the container image.
 - **--env-file** : Any environment variables specified via env-files.  If multiple files specified, then they override each other in order of entry.
 - **--env** : Any environment variables specified will override previous settings.

docs/source/markdown/podman-run.1.md

@@ -1402,6 +1402,7 @@ Environment variables within containers can be set using multiple different opti
 in the following order of precedence (later entries override earlier entries):
 
 - **--env-host**: Host environment of the process executing Podman is added.
+- **--http-proxy**: By default, several environment variables will be passed in from the host, such as **http_proxy** and **no_proxy**. See **--http-proxy** for details.
 - Container image: Any environment variables specified in the container image.
 - **--env-file**: Any environment variables specified via env-files.  If multiple files specified, then they override each other in order of entry.
 - **--env**: Any environment variables specified will override previous settings.