[bugfix] set enforce-index-use default value to strict

Author: marmoure

exist-distribution/src/main/config/conf.xml

@@ -937,7 +937,7 @@
     <!-- TODO: add attribute 'enabled="yes/no"' -->
     <xquery enable-java-binding="no" disable-deprecated-functions="no" 
             enable-query-rewriting="yes" backwardCompatible="no" 
-            enforce-index-use="always"
+            enforce-index-use="strict"
             raise-error-on-failed-retrieval="no">
 
         <builtin-modules>

schema/conf.xsd

@@ -382,7 +382,7 @@
                         <xs:attribute name="backwardCompatible" type="yes_no" default="no"/>
                         <xs:attribute name="raise-error-on-failed-retrieval" type="yes_no"
                             default="no"/>
-                        <xs:attribute name="enforce-index-use" default="always">
+                        <xs:attribute name="enforce-index-use" default="strict">
                             <xs:simpleType>
                                 <xs:restriction base="xs:string">
                                     <xs:enumeration value="always"/>