sonatype/nexus — pull request #377 by nabcos (2012-04-20 09:21:15+00:00)
Title: o [NEXUS-5024] Set system properties on proxy settings change and fix problem reporting to use those.

That this ever worked was a side effect of the p2 plugin. p2 runtime sets the well-known http.proxy* system properties, which got picked up by the xmlrpc transport. A change in that transport (newest swizzle uses async-http-client, which does not use those properties by default) broke proxy settings even when p2 plugin was present.