Pandoc conversion

doc/manual/src/release-notes/rl-0.7.md

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+# Release 0.7 (2005-01-12)
+
+  - Binary patching. When upgrading components using pre-built binaries
+    (through nix-pull / nix-channel), Nix can automatically download and
+    apply binary patches to already installed components instead of full
+    downloads. Patching is “smart”: if there is a *sequence* of patches
+    to an installed component, Nix will use it. Patches are currently
+    generated automatically between Nixpkgs (pre-)releases.
+
+  - Simplifications to the substitute mechanism.
+
+  - Nix-pull now stores downloaded manifests in
+    `/nix/var/nix/manifests`.
+
+  - Metadata on files in the Nix store is canonicalised after builds:
+    the last-modified timestamp is set to 0 (00:00:00 1/1/1970), the
+    mode is set to 0444 or 0555 (readable and possibly executable by
+    all; setuid/setgid bits are dropped), and the group is set to the
+    default. This ensures that the result of a build and an installation
+    through a substitute is the same; and that timestamp dependencies
+    are revealed.