net-mgmt/unifi8: Set UTF8 encoding on startup

In order to use non-ASCII characters in WiFi network names,
instruct java to use UTF8 encoding, similarly to what is
also done in startup script for Linux.

PR:		283443

net-mgmt/unifi8/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	unifi8
 PORTVERSION=	8.6.9
+PORTREVISION?=	1
 CATEGORIES=	net-mgmt java
 MASTER_SITES=	http://dl.ubnt.com/unifi/%SUBDIR%/:unifi \
 		https://repo1.maven.org/maven2/%SUBDIR%/:jax

net-mgmt/unifi8/files/unifi.in

@@ -45,8 +45,11 @@ load_rc_config ${name}
 : ${unifi_group:=%%GROUPS%%}
 : ${unifi_chdir=%%JAVASHAREDIR%%/unifi}
 : ${unifi_java_home=%%JAVA_HOME%%}
-: ${unifi_javaflags="-Djava.awt.headless=true -Xmx1024M \
+: ${unifi_javaflags="-Djava.awt.headless=true \
 	-Djava.net.preferIPv4Stack=false \
+	-Dapple.awt.UIElement=true \
+	-Dfile.encoding=UTF-8 \
+	-Xmx1024M \
 	--add-opens java.base/java.lang=ALL-UNNAMED \
 	--add-opens java.base/java.time=ALL-UNNAMED \
 	--add-opens java.base/sun.security.util=ALL-UNNAMED \