Rename 'repo.scan' to 'scan-path'

The 'repo.' prefix will soon be reserved for repo-specific config
options.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgitrc.5.txt

@@ -203,11 +203,6 @@ repo.group::
 	A value for the current repository group, which all repositories
 	specified after this setting will inherit. Default value: none.
 
-repo.scan::
-	A path which will be scanned for repositories. If caching is enabled,
-	the result will be cached as a cgitrc include-file in the cache
-	directory. Default value: none. See also: cache-scanrc-ttl.
-
 robots::
 	Text used as content for the "robots" meta-tag. Default value:
 	"index, nofollow".
@@ -225,6 +220,11 @@ root-title::
 	Text printed as heading on the repository index page. Default value:
 	"Git Repository Browser".
 
+scan-path::
+	A path which will be scanned for repositories. If caching is enabled,
+	the result will be cached as a cgitrc include-file in the cache
+	directory. Default value: none. See also: cache-scanrc-ttl.
+
 snapshots::
 	Text which specifies the default set of snapshot formats generated by
 	cgit. The value is a space-separated list of zero or more of the