Migrate content from wiki

doc/support/asciidoc.conf

Index: doc/support/asciidoc.conf
diff --git a/doc/asciidoc.conf b/doc/support/asciidoc.conf
similarity index 83%
rename from doc/asciidoc.conf
rename to doc/support/asciidoc.conf
index ab330b34cb9c14da47c7257a2c17df02bfcd44a3..a4ab2c4c9853e225eae73467b30aa8b710f5fd33 100644
--- a/doc/asciidoc.conf
+++ b/doc/support/asciidoc.conf
@@ -19,15 +19,20 @@ newline=\n
 # The default AsciiDoc lang-en.conf uses docdate and doctime for the
 # last-updated line in footer-text. These attributes are taken from the file’s
 # mtime and cannot be overridden. For a git-based project, the date of the last
-# revision is desirable, so change this to use revdate, an attribute that can be
-# computed and passed in by the script that runs AsciiDoc. For man pages, use
+# revision is desirable, so change this to use git_date, an attribute that can
+# be computed and passed in by the script that runs AsciiDoc. For man pages, use
 # the mansource and manversion attributes instead of the hard-coded “Version”
 # string and revnumber attribute, so that the version will appear as “Crashpad
 # 0.7.0” as it does in “man” output.
 ifdef::basebackend-html[]
 [footer-text]
+ifdef::doctype-manpage[]
 {mansource=Version} {manversion={revnumber}}{basebackend-xhtml11?<br />}{basebackend-xhtml11=<br>}
-Last updated {revdate}
+endif::doctype-manpage[]
+ifndef::doctype-manpage[]
+Version {revnumber}{basebackend-xhtml11?<br />}{basebackend-xhtml11=<br>}
+endif::doctype-manpage[]
+Last updated {git_date}
 endif::basebackend-html[]
 
 # The man_link macro was inspired by git’s linkgit macro. See