Specifies a keyserver to provide the GPG key. Valid options: a string containing a domain name or a full URL (http://, https://,
hkp:// or hkps://). The hkps:// protocol is currently only supported on Ubuntu 18.04.
-Default value: `$::apt::keyserver`
+Default value: `$apt::keyserver`
##### <a name="weak_ssl"></a>`weak_ssl`
Passes additional options to `apt-key adv --keyserver-options`.
-Default value: `$::apt::key_options`
+Default value: `$apt::key_options`
### <a name="aptmark"></a>`apt::mark`
Supplies options to be passed to the `add-apt-repository` command. Default: '-y'.
-Default value: `$::apt::ppa_options`
+Default value: `$apt::ppa_options`
##### <a name="release"></a>`release`
Names the package that provides the `apt-add-repository` command. Default: 'software-properties-common'.
-Default value: `$::apt::ppa_package`
+Default value: `$apt::ppa_package`
##### <a name="package_manage"></a>`package_manage`