Switch to side-by-side view

--- a/src/mk/manifest.txt
+++ b/src/mk/manifest.txt
@@ -437,6 +437,7 @@
 utils/netcon.h
 utils/pathut.cpp
 utils/pathut.h
+utils/ptmutex.h
 utils/pxattr.cpp
 utils/pxattr.h
 utils/readfile.cpp