do not build xrdpvr unless --enable-xrdpvr is used

Makefile.am

@@ -6,6 +6,12 @@ else
 FREERDPDIR =
 endif
 
+if XRDP_XRDPVR
+XRDPVRDIR = xrdpvr
+else
+XRDPVRDIR =
+endif
+
 SUBDIRS = \
   common \
   vnc \
@@ -21,4 +27,4 @@ SUBDIRS = \
   instfiles \
   genkeymap \
   xrdpapi \
-  xrdpvr
+  $(XRDPVRDIR)

configure.ac

@@ -47,6 +47,10 @@ AC_ARG_ENABLE(fuse, AS_HELP_STRING([--enable-fuse],
               [Build fuse(clipboard file / drive redir) (default: no)]),
               [fuse=true], [fuse=false])
 AM_CONDITIONAL(XRDP_FUSE, [test x$fuse = xtrue])
+AC_ARG_ENABLE(xrdpvr, AS_HELP_STRING([--enable-xrdpvr],
+              [Build xrdpvr module (default: no)]),
+              [xrdpvr=true], [xrdpvr=false])
+AM_CONDITIONAL(XRDP_XRDPVR, [test x$xrdpvr = xtrue])
 
 AM_CONDITIONAL(GOT_PREFIX, test "x${prefix}" != "xNONE"])