Revise asyncore documentation and document asynchat for the first time.
diff --git a/Doc/Makefile.deps b/Doc/Makefile.deps
index 29a6bc1..7693c21 100644
--- a/Doc/Makefile.deps
+++ b/Doc/Makefile.deps
@@ -315,6 +315,7 @@
 	lib/libstatvfs.tex \
 	lib/libtty.tex \
 	lib/libasyncore.tex \
+	lib/libasynchat.tex \
 	lib/libatexit.tex \
 	lib/libmmap.tex \
 	lib/tkinter.tex \