VirtualBox 6.0.10 additions build for 8.99.51

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

It builds with the following two patches (the first one almost
certainly wrong, although the result appears to be working):
.....
--- ./src/VBox/Runtime/common/path/RTPathAbsEx.cpp.ORIG    2019-07-20
11:55:09.661784205 +0100
+++ ./src/VBox/Runtime/common/path/RTPathAbsEx.cpp      2019-07-20
11:55:38.098838914 +0100
@@ -265,22 +265,8 @@
         cchInPlace = 0;
         cbCwd      = RT_MAX(cbCwd * 4, RTPATH_BIG_MAX);
         pszCwdFree = pszCwd = (char *)RTMemTmpAlloc(cbCwd);
-        if (pszCwdFree)
-        {
-            rc = RTPathGetCurrentOnDrive(pszPath[0], pszCwd, cbCwd);
-            if (RT_FAILURE(rc))
-            {
-                if (rc == VERR_BUFFER_OVERFLOW)
-                    rc = VERR_FILENAME_TOO_LONG;
-                RTMemTmpFree(pszCwdFree);
-                return rc;
-            }
-        }
-        else
-        {
-            *pcbAbsPath = cbCwd + 1 + pParsed->cchPath + 1;
-            return rc;
-        }
+        *pcbAbsPath = cbCwd + 1 + pParsed->cchPath + 1;
+        return rc;
     }
     else
         return rc;
--- ./src/VBox/Additions/common/VBoxGuest/VBoxGuest-netbsd.c.orig
 2019-07-12 09:30:47.000000000 +0100
+++ ./src/VBox/Additions/common/VBoxGuest/VBoxGuest-netbsd.c
2019-07-20 11:21:18.400477530 +0100
@@ -1011,7 +1011,7 @@

             error = do_sys_mknod(curlwp, "/dev/vboxguest",
                                  0666|S_IFCHR, makedev(cmajor, 0),
-                                 &retval, UIO_SYSSPACE);
+                                 UIO_SYSSPACE);
             if (error == EEXIST)
                 error = 0;
             break;
......

One also needs
TEMPLATE_VBOXGUESTR3EXE_LIBS     = $(TEMPLATE_VBOXR3EXE_LIBS) crypt

in LocalConfig.kmk


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