docs: convert articles to reructuredtext

This uses the previously added scripts to convert the documentation to
reStructuredText, which is both easier to read offline, and can be used
to generate modern HTML for online documentation.

No modification to the generated results have been done.

Acked-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4630>

docs/relnotes/7.8.1.rst

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+Mesa 7.8.1 Release Notes / April 5, 2010
+========================================
+
+Mesa 7.8.1 fixes a couple critical bugs in the recent Mesa 7.8 release.
+Even though this is a bug fix release, given its proximity to the 7.8
+release, a new development release, it should also be considered new
+development release. People who are concerned with stability and
+reliability should stick with a previous release, such as 7.7.1, or wait
+for Mesa 7.8.2.
+
+Mesa 7.8.1 implements the OpenGL 2.1 API, but the version reported by
+glGetString(GL_VERSION) depends on the particular driver being used.
+Some drivers don't support all the features required in OpenGL 2.1.
+
+See the `Compiling/Installing page <../install.html>`__ for
+prerequisites for DRI hardware acceleration.
+
+MD5 checksums
+-------------
+
+::
+
+   62e8e47cbd63741b4bbe634dcdc8a56a  MesaLib-7.8.1.tar.gz
+   25ec15f8e41fde6d206118cc786dbac4  MesaLib-7.8.1.tar.bz2
+   22b1153010ffdf513836ea9931159e80  MesaLib-7.8.1.zip
+   c9c0a830923d3820807a08c09d521b3e  MesaDemos-7.8.1.tar.gz
+   9ef47f911869657c6bf2f43ebce86b61  MesaDemos-7.8.1.tar.bz2
+   93720605eb3f784f9bcc289a4dd2ff52  MesaDemos-7.8.1.zip
+   ed1d0b1e960afe6a3768eab747cbdbd3  MesaGLUT-7.8.1.tar.gz
+   6bae516a44c6d26ff3152c960ab648e7  MesaGLUT-7.8.1.tar.bz2
+   ba306f603ea73c30ee0e7efa14dc5581  MesaGLUT-7.8.1.zip
+
+New features
+------------
+
+None.
+
+Bug fixes
+---------
+
+-  Fix incorrect enums for GLX_INTEL_swap_event by updating glxext.h to
+   version 27 from OpenGL.org.
+-  Fix compilation errors on non-GLX_DIRECT_RENDERING builds.
+-  Various fixes for building Mesa on OS X.
+-  Pass GLX drawable ID to dri2InvalidateBuffers. Fixes bug #27190.
+
+Changes
+-------
+
+None.