Add backslashes to parentheses in awk regex because if not, they are

treated as regex groups.

src/tools/pgindent/pgindent

@@ -56,7 +56,7 @@ do
 			    line1 !~ /^typedef/ &&
 			    line1 !~ /^extern[ 	][ 	]*"C"/ &&
 			    line1 !~ /=/ &&
-			    line1 ~ /)/)
+			    line1 ~ /\)/)
 				print "int	pgindent_func_no_var_fix;";
 			line1 = line2;
 		}
@@ -1688,16 +1688,16 @@ do
 #  like real functions.
 	awk '	BEGIN	{paren_level = 0}  
 	{
-		if ($0 ~ /^[a-zA-Z_][a-zA-Z_0-9]*[^(]*$/)
+		if ($0 ~ /^[a-zA-Z_][a-zA-Z_0-9]*[^\(]*$/)
 		{
 			saved_len = 0;
 			saved_lines[++saved_len] = $0;
 			if ((getline saved_lines[++saved_len]) == 0)
 				print saved_lines[1];
 			else
-			if (saved_lines[saved_len] !~ /^[a-zA-Z_][a-zA-Z_0-9]*(/ ||
-			    saved_lines[saved_len] ~  /^[a-zA-Z_][a-zA-Z_0-9]*(.*)$/ ||
-			    saved_lines[saved_len] ~  /^[a-zA-Z_][a-zA-Z_0-9]*(.*);$/)
+			if (saved_lines[saved_len] !~ /^[a-zA-Z_][a-zA-Z_0-9]*\(/ ||
+			    saved_lines[saved_len] ~  /^[a-zA-Z_][a-zA-Z_0-9]*\(.*\)$/ ||
+			    saved_lines[saved_len] ~  /^[a-zA-Z_][a-zA-Z_0-9]*\(.*\);$/)
 			{
 				print saved_lines[1];
 				print saved_lines[2];
@@ -1714,7 +1714,7 @@ do
 				}
 				for (i=1; i <= saved_len; i++)
 				{
-					if (i == 1 && saved_lines[saved_len] ~ /);$/)
+					if (i == 1 && saved_lines[saved_len] ~ /\);$/)
 					{
 						printf "%s", saved_lines[i];
 						if (substr(saved_lines[i], length(saved_lines[i]),1) != "*")