Log message:
Complete standardization of messages according to latest pkglint.

Log message:
* Introduce BLACKDOWN_ARCH, which is usually just ${MACHINE_ARCH}
  (but is "ppc" on powerpc), and use it instead of MACHINE_ARCH where
  applicable.

* Introduce BLACKDOWN_REL, which is usually just "FCS-02b" (but is
  "rc1" on arm).

* Simplify how MASTER_SITES and DISTFILES get defined.

* Improve some formatting.

* Replace literal "i386" in PLIST with ${BLACKDOWN_ARCH}.

* Adjust bin/.java_wrapper for powerpc platforms, and update the
  similar patch for bin/realpath.

On NetBSD/powerpc, this greatly reduces noise during package
installation, and gets us further at runtime. Believe it or not,
seeing "/lib/libc.so.6: version `GLIBC_2.2' not found" is an
improvement.

Log message:
Don't set DISTFILES directly on powerpc; set DISTNAME instead, to
let the .bin suffix get added as on other platforms.

Log message:
Some changes to make this work well on Linux:
- For this package i[3-6]86 can be set equal with i386, allowing us to specify
  the download site using MACHINE_ARCH.
- Enable for platform Linux-*-i[3-6]86
- Don't display MESSAGE about requiring COMPAT_LINUX when on linux:
   => move MESSAGE to MESSAGE.NetBSD

Log message:
Shuffle logic to ensure that DISTNAME is always set, even on systems
unsupported by this JRE. In such cases, this avoids the error
message "CATEGORIES and DISTNAME are mandatory" and allows the
usual NOT_FOR_PLATFORM message to be displayed. Also, entab a bit.

Log message:
Initial import of blackdown-jre13, split off from lang/blackdown-jdk13.
Common Makefile functionality for this and lang/blackdown-jdk13 is
in Makefile.common.