Apache NetBeans Release Roadmap

Based on discussions by Antonio and others in July 2018 on this thread:

...the proposal is to have a NetBeans release 4 times per year, starting with August 2018:

August 2018: Apache NetBeans (incubating) 9.0 – released (end of July)
- JDK 9 and 10 support
November 2018: proposal – https://lists.apache.org/thread.html/98e604268738d3f10f8dfae48d662fe468e8cdf847395ef5b3614dc4@%3Cdev.netbeans.apache.org%3E
- Rough schedule proposal for Apache NetBeans 10:
  - Stage 1: September 24 – feature freeze
    - To be included in the release:
      - Feature: JDK 11 (P1)
      - Feature: PHP (P1)
      - JavaScript (P2)
      - Groovy (P2)
      - Translation bundles from 3rd donation, if it makes it in in time
  - Stage 2: October
    - create vote candidate 1 (because each vote candidate is about two weeks)
    - include testing, e.g., NetCAT, on JDK 11 (to be released 25 September)
    - focus on producing the release throughout October.
  - Stage 3: November
    - release of sources and convenience binary (P1)
    - site updates (P1)
    - installers (P3), also the question is how to distribute installers, since from Apache we distribute sources and convenience binary only
    - Note: a November release does not necessarily mean releasing 1 November, so we have 4 weeks here to play with

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