Do not rely on PATH to load included scripts. Fix for BSDI bug #5189.

build/autoconf/altoptions.m4

@@ -96,9 +96,8 @@ AC_DEFUN(MOZ_READ_MOZCONFIG,
 [AC_REQUIRE([AC_INIT_BINSH])dnl
 # Read in '.mozconfig' script to set the initial options.
 # See the load-mozconfig.sh script for more details.
-TOPSRCDIR=`dirname [$]0`
-PATH="$TOPSRCDIR/build/autoconf:$PATH"
-. load-mozconfig.sh])
+_topsrcdir=`dirname [$]0`
+. $_topsrcdir/build/autoconf/load-mozconfig.sh])
 
 dnl This gets inserted at the top of the configure script
 MOZ_READ_MOZCONFIG

build/autoconf/load-mozconfig.sh

@@ -86,7 +86,8 @@ done
 
 # Call find-mozconfig.sh 
 #   In params:   $MOZCONFIG $HOME (old:$MOZ_MYCONFIG)
-MOZCONFIG=`$TOPSRCDIR/build/autoconf/find-mozconfig.sh`
+_topsrcdir=`dirname $0`
+MOZCONFIG=`$_topsrcdir/build/autoconf/find-mozconfig.sh`
 
 if [ "$MOZCONFIG" ]; then
   . $MOZCONFIG