Update to 20020429, a stable release for 4.6-RELEASE.

• Make portsdb -U respect PORTS_DBDIR even when it is different than PORTS_DIR.
  
  Reported by: Shigeto TAJIMA <tajima@ics.es.osaka-u.ac.jp>

• Do not override the user-defined value of PKG_PATH.
  
  Reported by: The Anarcat <anarcat@anarcat.dyndns.org>