use compatible version for websockify

software/kvm/software.cfg

@@ -2,6 +2,9 @@
 extends = common.cfg
 
 [versions]
+# XXX - use websockify = 0.5.1 for compatibility with kvm frontend
+websockify = 0.5.1
+
 PyRSS2Gen = 1.1
 apache-libcloud = 0.16.0
 cns.recipe.symlink = 0.2.3
@@ -15,7 +18,6 @@ slapos.recipe.download = 1.0.dev-r4053
 slapos.recipe.template = 2.6
 slapos.toolbox = 0.46.1
 smmap = 0.9.0
-websockify = 0.6.0
 z3c.recipe.scripts = 1.0.1
 
 # Required by:
@@ -35,7 +37,7 @@ feedparser = 5.1.3
 lockfile = 0.10.2
 
 # Required by:
-# websockify==0.6.0
+# websockify==0.5.1
 numpy = 1.9.1
 
 # Required by: