Error code 1 when upgrading ftp-proxy port

[lists at socruel.nu]

Hello list,

on a 6.2-RELEASE-p7 system with an up to date ports tree I tried to
upgrade the ftp-proxy port. The following happened:

root at system sbin # portmaster ftp-proxy-4.1p2
===>>> Port to upgrade: ftp-proxy-4.1p2
===>>> Port directory: /usr/ports/ftp/ftp-proxy
===>>> Gathering distinfo list for installed ports in background
===>>> Launching 'make checksum' for ftp/ftp-proxy in background
===>>> Gathering dependency list for ftp/ftp-proxy from ports
===>>> Starting recursive 'make config' check
===>>> Recursive 'make config' check complete for ftp/ftp-proxy

===>>> Starting build for ftp/ftp-proxy <<<===

===>>> The 'make config' check revealed no dependencies to update

===>  Cleaning for ftp-proxy-4.1p2_1
===>  Vulnerability check disabled, database not found
===>  Extracting for ftp-proxy-4.1p2_1
=> MD5 Checksum OK for ftp-proxy-4.1p2.tar.gz.
=> SHA256 Checksum OK for ftp-proxy-4.1p2.tar.gz.
===>  Patching for ftp-proxy-4.1p2_1
===>   ftp-proxy-4.1p2_1 depends on shared library: event-1.3d - found
===>  Configuring for ftp-proxy-4.1p2_1
===>  Building for ftp-proxy-4.1p2_1
Warning: Object directory not changed from original
/usr/ports/ftp/ftp-proxy/work/ftp-proxy-4.1p2
cc -O -pipe  -I/usr/ports/ftp/ftp-proxy/work/ftp-proxy-4.1p2 -Wall
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith 
-Wno-uninitialized  -c ftp-proxy.c
ftp-proxy.c:32:19: event.h: No such file or directory
ftp-proxy.c: In function `client_error':
ftp-proxy.c:140: error: `EVBUFFER_EOF' undeclared (first use in this
function)
ftp-proxy.c:140: error: (Each undeclared identifier is reported only once
ftp-proxy.c:140: error: for each function it appears in.)
ftp-proxy.c:142: error: `EVBUFFER_ERROR' undeclared (first use in this
function)
ftp-proxy.c:142: error: `EVBUFFER_READ' undeclared (first use in this
function)
ftp-proxy.c:144: error: `EVBUFFER_TIMEOUT' undeclared (first use in this
function)
ftp-proxy.c:146: error: `EVBUFFER_WRITE' undeclared (first use in this
function)
ftp-proxy.c: In function `client_parse_anon':
ftp-proxy.c:186: warning: implicit declaration of function
`bufferevent_write'
ftp-proxy.c: In function `client_read':
ftp-proxy.c:239: warning: implicit declaration of function `bufferevent_read'
ftp-proxy.c: In function `end_session':
ftp-proxy.c:293: warning: implicit declaration of function `bufferevent_free'
ftp-proxy.c: In function `handle_connection':
ftp-proxy.c:493: warning: implicit declaration of function `bufferevent_new'
ftp-proxy.c:494: warning: assignment makes pointer from integer without a
cast
ftp-proxy.c:499: warning: implicit declaration of function
`bufferevent_settimeout'
ftp-proxy.c:500: warning: implicit declaration of function
`bufferevent_enable'
ftp-proxy.c:500: error: `EV_READ' undeclared (first use in this function)
ftp-proxy.c:500: error: `EV_TIMEOUT' undeclared (first use in this function)
ftp-proxy.c:503: warning: assignment makes pointer from integer without a
cast
ftp-proxy.c: In function `main':
ftp-proxy.c:592: error: storage size of 'ev' isn't known
ftp-proxy.c:592: error: storage size of 'ev_sighup' isn't known
ftp-proxy.c:592: error: storage size of 'ev_sigint' isn't known
ftp-proxy.c:592: error: storage size of 'ev_sigterm' isn't known
ftp-proxy.c:768: warning: implicit declaration of function `event_init'
ftp-proxy.c:772: warning: implicit declaration of function `signal_set'
ftp-proxy.c:775: warning: implicit declaration of function `signal_add'
ftp-proxy.c:779: warning: implicit declaration of function `event_set'
ftp-proxy.c:779: error: `EV_READ' undeclared (first use in this function)
ftp-proxy.c:779: error: `EV_PERSIST' undeclared (first use in this function)
ftp-proxy.c:780: warning: implicit declaration of function `event_add'
ftp-proxy.c:785: warning: implicit declaration of function `event_dispatch'
ftp-proxy.c:592: warning: unused variable `ev'
ftp-proxy.c:592: warning: unused variable `ev_sighup'
ftp-proxy.c:592: warning: unused variable `ev_sigint'
ftp-proxy.c:592: warning: unused variable `ev_sigterm'
ftp-proxy.c: In function `server_error':
ftp-proxy.c:904: error: `EVBUFFER_EOF' undeclared (first use in this
function)
ftp-proxy.c:906: error: `EVBUFFER_ERROR' undeclared (first use in this
function)
ftp-proxy.c:906: error: `EVBUFFER_READ' undeclared (first use in this
function)
ftp-proxy.c:908: error: `EVBUFFER_WRITE' undeclared (first use in this
function)
ftp-proxy.c:910: error: `EVBUFFER_TIMEOUT' undeclared (first use in this
function)
*** Error code 1

Stop in /usr/ports/ftp/ftp-proxy/work/ftp-proxy-4.1p2.
*** Error code 1

Stop in /usr/ports/ftp/ftp-proxy.

===>>> make failed for ftp/ftp-proxy
===>>> Aborting update
Terminated

Anyone any idea what this is?

Thanx in advance.


Regards,
Lars.