tools: add readme dsh and dnc

Change-Id: I8ba6bc51c6c6de4a11d9529bb8a52d002f7569e0
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d2a713f..6086fb4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -253,6 +253,11 @@
     target_link_libraries(upnpctrl PRIVATE dhtnet fmt::fmt readline)
     target_include_directories(upnpctrl PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tools)
     install(TARGETS upnpctrl RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+    install(FILES
+        tools/dnc/dnc.1
+        tools/dsh/dsh.1
+    DESTINATION ${CMAKE_INSTALL_MANDIR})
 endif()
 
 if (BUILD_BENCHMARKS)