Add a barely useful interface to b4-am

Aside from switching the 'b4 am' process to an asynchronous one, the
am-ready commands may not need a lot of work.  The more interesting
variant, piem-b4-am-from-mid, can find an associated code repository
and am the patch, but there's a lot that needs to be fleshed out.

1 files changed, 4 insertions, 0 deletions

diff --git a/piem.texi b/piem.texi
index 15b0e2e..137a7cb 100644
--- a/piem.texi
+++ b/piem.texi
@@ -45,6 +45,7 @@ This manual is for piem version @value{VERSION}.
 
 @menu
 * Overview::
+* b4 interface::
 * Related tools::
 * Contributing::
 
@@ -64,6 +65,9 @@ Indices
 @node public-inbox
 @section public-inbox
 
+@node b4 interface
+@chapter b4 interface
+
 @node Related tools
 @chapter Related tools