Merged revision(s) 16288-16289 from trunk/OpenMPT:
[Doc] Adjust openmpt_release.md.
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[Doc] Update 1.30 changelog.
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git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.30@16290 56274372-70c3-4bfc-bfc3-4c3a0b034d27