Confluence 4.3 source distribution has some critical problems that prevent it from building

The Confluence 4.3 source distribution cannot currently be built. Originally reported on answers.atlassian.com (see https://answers.atlassian.com/questions/91449/building-confluence-from-source-in-4-3-still-broken), I tested out myself on a clean environment and found the following problems:

• The source distribution for 4.3 is missing the maven2 binaries. Requires maven2 to already be installed and configured correctly on the development environment.

• The source distribution fails to compile because of the following missing dependencies:
  • javax.activation:activation:1.0.2
  • javax.jms:jms:1.1
  • com.atlassian.plugins.rest:atlassian-rest-doclet:2.6.2.1

• The source distribution fails to compile because the top level build.sh attempts to build 2 projects that don't actually exist in the source tree:
  • atlassian-plugins-core
  • atlassian-plugins-webfragement