allow webrev to be run directly from usr/src/tools/scripts/webrev

*** 24,33 ****
--- 24,34 ----
  # Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  #
  
  # Copyright 2008, 2010, Richard Lowe
  # Copyright 2012 Marcel Telka <marcel@telka.sk>
+ # Copyright 2013 PALO, Richard. All rights reserved.
  
  #
  # This script takes a file list and a workspace and builds a set of html files
  # suitable for doing a code review of source changes via a web page.
  # Documentation is available via the manual page, webrev.1, or just
*** 2936,2951 ****
  typeset -A itsinfo
  typeset -r its_sed_script=/tmp/$$.its_sed
  valid_prefixes=
  if [[ -z $nflag ]]; then
          DEFREGFILE="$(/bin/dirname "$(whence $0)")/../etc/its.reg"
          if [[ -n $Iflag ]]; then
                  REGFILE=$ITSREG
          elif [[ -r $HOME/.its.reg ]]; then
                  REGFILE=$HOME/.its.reg
!         else
                  REGFILE=$DEFREGFILE
          fi
          if [[ ! -r $REGFILE ]]; then
                  print "ERROR: Unable to read database registry file $REGFILE"
                  exit 1
          elif [[ $REGFILE != $DEFREGFILE ]]; then
--- 2937,2955 ----
  typeset -A itsinfo
  typeset -r its_sed_script=/tmp/$$.its_sed
  valid_prefixes=
  if [[ -z $nflag ]]; then
          DEFREGFILE="$(/bin/dirname "$(whence $0)")/../etc/its.reg"
+         DEFREGFILE0="$(/bin/dirname "$(whence $0)")/its.reg"
          if [[ -n $Iflag ]]; then
                  REGFILE=$ITSREG
          elif [[ -r $HOME/.its.reg ]]; then
                  REGFILE=$HOME/.its.reg
!         elif [[ -r $DEFREGFILE ]]; then
                  REGFILE=$DEFREGFILE
+         else
+                 REGFILE=$DEFREGFILE0
          fi
          if [[ ! -r $REGFILE ]]; then
                  print "ERROR: Unable to read database registry file $REGFILE"
                  exit 1
          elif [[ $REGFILE != $DEFREGFILE ]]; then
*** 2965,2975 ****
--- 2969,2984 ----
                  fi
          done
  
  
          DEFCONFFILE="$(/bin/dirname "$(whence $0)")/../etc/its.conf"
+         DEFCONFFILE0="$(/bin/dirname "$(whence $0)")/its.conf"
+         if [[ -r $DEFCONFFILE ]]; then
                  CONFFILES=$DEFCONFFILE
+         else
+                 CONFFILES=$DEFCONFFILE0
+         fi
          if [[ -r $HOME/.its.conf ]]; then
                  CONFFILES="${CONFFILES} $HOME/.its.conf"
          fi
          if [[ -n $Cflag ]]; then
                  CONFFILES="${CONFFILES} ${ITSCONF}"