Use a POSIX implementation to check for substring

This works with all shells, even busybox.

include/tests_php

@@ -292,7 +292,11 @@
         FOUND=0
         for FILE in ${PHPINI_ALLFILES}; do
             # Don't look at this setting in cli configuration
-            if [[ ${FILE} == *"/cli/"* ]]; then continue; fi
+            case "${FILE}" in
+                */cli/*)
+                    continue
+                    ;;
+            esac
             LogText "Test: Checking file ${FILE}"
             FIND=$(${EGREPBINARY} -i 'expose_php.*(on|yes|1)' ${FILE} | ${GREPBINARY} -v '^;')
             if HasData "${FIND}"; then