another last minute fix about mysql.cnf parsing

debian/config

@@ -46,7 +46,7 @@ if [ -r /etc/alternc/my.cnf ]; then
     # * add a right quote operator at the end of line (;s)
     # * convert mysql variables into our MYSQL_ naming convention (;s)
     # * print the result (;p)
-    eval `sed -n -e "/=/{s/ *= */='/;s/\$/'/;s/host/MYSQL_HOST/;s/user/MYSQL_LOGIN/;s/password/MYSQL_PASS/;s/database/MYSQL_DATABASE/;p}" /etc/alternc/my.cnf`
+    eval `sed -n -e "/=/{s/ *= *\"?/='/;s/\"?\$/'/;s/host/MYSQL_HOST/;s/user/MYSQL_LOGIN/;s/password/MYSQL_PASS/;s/database/MYSQL_DATABASE/;p}" /etc/alternc/my.cnf`
 fi
 
 # mettre les valeurs de local.sh comme "default" pour debconf