Add proxy user

src/etc/group

@@ -16,6 +16,7 @@ utmp:*:45:
 www:*:67:
 network:*:69:
 named:*:70:
+proxy:*:71:
 dialer:*:117:
 nogroup:*:32766:
 nobody:*:32767:

src/etc/master.passwd

@@ -5,4 +5,5 @@ bin:*:3:7::0:0:Binaries Commands and Source,,,:/:/sbin/nologin
 uucp:*:66:1::0:0:UNIX-to-UNIX Copy:/var/spool/uucppublic:/usr/libexec/uucp/uucico
 www:*:67:67::0:0:HTTP server:/var/www:/sbin/nologin
 named:*:70:70::0:0:BIND Name Service Daemon:/var/named:/sbin/nologin
+proxy:*:71:71::0:0:Proxy Services:/nonexistent:/sbin/nologin
 nobody:*:32767:32767::0:0:Unprivileged user:/nonexistent:/sbin/nologin