Deprecate ArmeriaSettings.ip and add ArmeriaSettings.address

[minwoox]

Users can specify an IP address of Armeria server via a Spring property file:

armeria/spring/boot2-autoconfigure/src/main/java/com/linecorp/armeria/spring/ArmeriaSettings.java

Lines 83 to 87 in 39df04b

	/**
	* IP address to bind to. If not set, will bind to all addresses, e.g. {@code 0.0.0.0}.
	*/
	@Nullable
	private String ip;

It only takes an IP address so if a hostname is specified, Armeria throws an exception:

armeria/spring/boot2-autoconfigure/src/main/java/com/linecorp/armeria/internal/spring/ArmeriaConfigurationNetUtil.java

Line 84 in 7626562

throw new IllegalStateException("invalid IP address: " + ip);

However, Spring allows Users to specify a hostname because Spring converts the input to an InetAddress.
So we need to also allow users to specify a hostname by

• adding ArmeriaSettings.address whose type is InetAddress
• deprecating ArmeriaSettings.ip

[minwoox]

cc @kojilin