Subversion checkout failed

[semaphore45 at yahoo.com]

Hello MP list, 

I tried to upgrade all the outdated ports on Mac OS X 10.6, but it stopped with error:
 
Error: org.macports.fetch for port libnetpbm returned: Subversion check out failed
Please see the log file for port libnetpbm for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_netpbm/libnetpbm/main.log

In said log files, it seems unable to reach the server:

:info:fetch svn: OPTIONS of 'https://svn.code.sf.net/p/netpbm/code/advanced': could not connect to server (https://svn.code.sf.net)

I looked for past filed bugs, but nothing conclusive, as my firewall was off.

Other suggestions?

Regards, 
Pat