Fix computation of PG_VERSION_NUM by configure: remove unnecessary and

unportable backslashes in awk script (per Patrick Welche), and add
brackets to prevent autoconf from mangling sed's regexp (the sed call
here never did what was expected).

configure

@@ -5271,9 +5271,9 @@ fi
 
 # Supply a numeric version string for use by 3rd party add-ons
 # awk -F is a regex on some platforms, and not on others, so make "." a tab
-PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/A-Za-z.*$//' |
+PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
 tr '.' '	' |
-$AWK '{printf \"%d%02d%02d\", $1, $2, (NF >= 3) ? $3 : 0}'`"
+$AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"
 
 cat >>confdefs.h <<_ACEOF
 #define PG_VERSION_NUM $PG_VERSION_NUM

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.515 2007/06/04 21:55:43 adunstan Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.516 2007/06/29 16:18:43 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -696,9 +696,9 @@ fi
 
 # Supply a numeric version string for use by 3rd party add-ons
 # awk -F is a regex on some platforms, and not on others, so make "." a tab
-PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
+[PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
 tr '.' '	' |
-$AWK '{printf \"%d%02d%02d\", $1, $2, (NF >= 3) ? $3 : 0}'`"
+$AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"]
 AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_VERSION_NUM, [PostgreSQL version as a number])
 
 ##