create new independent uid/gid for tftp_proxy and ftp_proxy.

They should not share a uid.  Leave the proxy uid for later mop-up
(sysmerge does not handle uid renamings well enough)
ok dlg, ok aja a while back

src/etc/group

@@ -69,6 +69,8 @@ _file:*:104:
 _radiusd:*:105:
 _eigrpd:*:106:
 _vmd:*:107:
+_tftp_proxy:*:108:
+_ftp_proxy:*:109:
 dialer:*:117:
 nogroup:*:32766:
 nobody:*:32767:

src/etc/mail/aliases

@@ -1,5 +1,5 @@
 #
-#	$OpenBSD: aliases,v 1.53 2015/11/09 00:18:37 mlarkin Exp $
+#	$OpenBSD: aliases,v 1.54 2015/12/01 07:31:29 deraadt Exp $
 #
 #  Aliases in this file will NOT be expanded in the header from
 #  Mail, but WILL be visible over networks or from /usr/libexec/mail.local.
@@ -69,7 +69,9 @@ _x11:   /dev/null
 _ypldap: /dev/null
 bin:	/dev/null
 nobody:	/dev/null
-proxy:  /dev/null
+proxy:  /dev/null		# remove in 6.0
+_tftp_proxy: /dev/null
+_ftp_proxy: /dev/null
 sshd:   /dev/null
 
 # Well-known aliases -- these should be filled in!

src/etc/master.passwd

@@ -18,7 +18,7 @@ _spamd:*:62:62::0:0:Spam Daemon:/var/empty:/sbin/nologin
 uucp:*:66:1::0:0:UNIX-to-UNIX Copy:/var/spool/uucppublic:/sbin/nologin
 www:*:67:67::0:0:HTTP Server:/var/www:/sbin/nologin
 _isakmpd:*:68:68::0:0:isakmpd privsep:/var/empty:/sbin/nologin
-proxy:*:71:71::0:0:Proxy Services:/nonexistent:/sbin/nologin
+proxy:*:71:71::0:0:Old proxy daemon (remove in 6.0):/nonexistent:/sbin/nologin
 _syslogd:*:73:73::0:0:Syslog Daemon:/var/empty:/sbin/nologin
 _pflogd:*:74:74::0:0:pflogd privsep:/var/empty:/sbin/nologin
 _bgpd:*:75:75::0:0:BGP Daemon:/var/empty:/sbin/nologin
@@ -52,4 +52,6 @@ _file:*:104:104::0:0:file privsep:/var/empty:/sbin/nologin
 _radiusd:*:105:105::0:0:RADIUS Daemon:/var/empty:/sbin/nologin
 _eigrpd:*:106:106::0:0:EIGRP Daemon:/var/empty:/sbin/nologin
 _vmd:*:107:107::0:0:VM Daemon:/var/empty:/sbin/nologin
+_tftp_proxy:*:108:108::0:0:tftp proxy daemon:/nonexistent:/sbin/nologin
+_ftp_proxy:*:109:109::0:0:ftp proxy daemon:/nonexistent:/sbin/nologin
 nobody:*:32767:32767::0:0:Unprivileged user:/nonexistent:/sbin/nologin