implement maxsize log and command

* maxsize: New command to tell git-annex how large the expected maximum
  size of a repository is.
* vicfg: Include maxsize configuration.

doc/git-annex-maxsize.mdwn

@@ -6,14 +6,12 @@ git-annex maxsize - configure maximum size of a repository
 
 git annex maxsize repository size
 
-git annex maxsize here --auto
-
 git annex maxsize repository
 
 # DESCRIPTION
 
 This configures the maximum combined size of annexed files that can be
-stored in a repository. When run without a size or the --auto option,
+stored in a repository. When run without a size,
 it displays the currently configured maxsize.
 
 The repository can be specified by git remote name or
@@ -33,7 +31,11 @@ gigabyte, then it would make sense to run
 
 # OPTIONS
 
-* The [[git-annex-common-options]](1) can be used.
+* `--bytes`  
+
+  Displays the maximum size in bytes, disabling the default nicer units.
+
+* The [[git-annex-common-options]](1) can also be used.
 
 # SEE ALSO
 

doc/git-annex.mdwn

@@ -333,6 +333,10 @@ content from the key-value store.
   
   See [[git-annex-required]](1) for details.
 
+* `maxsize repository [size]`
+
+  Get or set maximum size of repository.
+
 * `initcluster`
 
   Initializes a new cluster.

doc/internals.mdwn

@@ -176,6 +176,16 @@ The file format is one line per group, starting with a timestamp, then a
 space, then the group name followed by a space and then the preferred
 content expression.
 
+## `maxsize.log`
+
+Records the maximum combined size of annexed files that can be stored in
+a repository.
+
+The file format is a timestamp, followed by the UUID of a repository,
+followed by the size in bytes. For example:
+
+	1317929189.157237s e605dca6-446a-11e0-8b2a-002170d25c55 100000000000
+
 ## `export.log`
 
 Tracks what trees have been exported to special remotes by

doc/todo/git-annex_proxies.mdwn

@@ -45,7 +45,7 @@ Planned schedule of work:
   Also note that "fullybalanced=foo:2" is not currently actually
   implemented!
 
-* Add `git-annex maxsize` command.
+* `git-annex info` can use maxsize to display how full repositories are
 
 * balanced= and fullybalanced= need to limit the set of repositories to
   ones with enough free space to contain a key.