databases/mysql-udf: Mark DEPRECATED

- Upstream mentions about using MySQL 4.0 and has not been updated since
  2007
- Set EXPIRATION_DATE on 2023-12-31 along with MySQL 5.7
- Add LICENSE=BSD2CLAUSE as mentioned in their homepage
- Mark to ignore with mysql 8.0 [1]

PR:		269203 [1]
Reported by:	exp-run [1]

databases/mysql-udf/Makefile

@@ -8,11 +8,18 @@ MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Set of user-defined functions for the MySQL server
 WWW=		http://mysql-udf.sourceforge.net/
 
-WRKSRC=		${WRKDIR}/${PORTNAME}
+LICENSE=	BSD2CLAUSE
+
+DEPRECATED=	Upstream last update was in 2007
+EXPIRATION_DATE=	2023-12-31
 
 USES=		mysql
+IGNORE_WITH_MYSQL=	80
+
 CFLAGS+=	-fPIC
 
+WRKSRC=		${WRKDIR}/${PORTNAME}
+
 MODULES=	colwidth confidence_higher confidence_lower correlation \
 		faculty geomean intercept kurtosis longest median noverm \
 		skewness slope stdnorm_density stdnorm_dist weightedavg