Updated the docs for pre-/post-xfer exec.

rsyncd.conf.yo

@@ -458,7 +458,8 @@ dit(bf(pre-xfer exec), bf(post-xfer exec)) You may specify a command to be run
 before and/or after the transfer.  If the bf(pre-xfer exec) command fails, the
 transfer is aborted before it begins.
 
-The following environment variables are set for both commands:
+The following environment variables will be set, though some are
+specific to the pre-xfer or the post-xfer environment:
 
 quote(itemize(
   it() bf(RSYNC_MODULE_NAME): The name of the module being accessed.
@@ -466,22 +467,18 @@ quote(itemize(
   it() bf(RSYNC_HOST_ADDR): The accessing host's IP address.
   it() bf(RSYNC_HOST_NAME): The accessing host's name.
   it() bf(RSYNC_USER_NAME): The accessing user's name (empty if no user).
-))
-
-These environment variables will also be set for the bf(post-xfer exec)
-command:
-
-quote(itemize(
-  it() bf(RSYNC_EXIT_STATUS): rsync's exit value.  This will be 0 for a
+  it() bf(RSYNC_REQUEST): (pre-xfer only) The module/path info specified
+  by the user (note that the user can specify multiple source files,
+  so the request can be something like "mod/path1 mod/path2", etc.).
+  it() bf(RSYNC_EXIT_STATUS): (post-xfer only) rsync's exit value.  This will be 0 for a
   successful run, a positive value for an error that rsync returned
   (e.g. 23=partial xfer), or a -1 if rsync failed to exit properly.
-  it() bf(RSYNC_RAW_STATUS): the raw exit value from waitpid().
+  it() bf(RSYNC_RAW_STATUS): (post-xfer only) the raw exit value from waitpid().
 ))
 
 Even though the commands can be associated with a particular module, they
 are run using the permissions of the user that started the daemon (not the
-module's uid/gid setting) without any chroot restrictions (even if the
-module will/has run chroot()ed).
+module's uid/gid setting) without any chroot restrictions.
 
 enddit()