Document support for comma-separated list of names in <springProfile>

See gh-3493

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -1074,7 +1074,8 @@ it's loaded too early. You need to either use `logback-spring.xml` or define a
 The `<springProfile>` tag allows you to optionally include or exclude sections of
 configuration based on the active Spring profiles. Profile sections are supported anywhere
 within the `<configuration>` element. Use the `name` attribute to specify which profile
-accepts the configuration.
+accepts the configuration. Multiple profiles can be specified using a comma-separated
+list.
 
 [source,xml,indent=0]
 ----
@@ -1082,6 +1083,10 @@ accepts the configuration.
 		<!-- configuration to be enabled when the "staging" profile is active -->
 	</springProfile>
 
+	<springProfile name="dev, staging">
+		<!-- configuration to be enabled when the "dev" or "staging" profiles are active -->
+	</springProfile>
+
 	<springProfile name="!production">
 		<!-- configuration to be enabled when the "production" profile is not active -->
 	</springProfile>