Adjust content length

cl-fix.cc

length_field_loc = TSMimeHdrFieldFind(bufp, hdr_loc, TS_MIME_FIELD_CONTENT_LENGTH, TS_MIME_LEN_CONTENT_LENGTH);
if (length_field_loc) {
    content_length = TSMimeHdrFieldValueUintGet(bufp, hdr_loc, length_field_loc, 0);
	TSDebug(DBG_TAG, "Content-Length was: %u", content_length);
    new_content_length = content_length + delta;
	
	TSMimeHdrFieldValuesClear(bufp, hdr_loc, length_field_loc);
	TSMimeHdrFieldValueUintInsert(bufp, hdr_loc, length_field_loc, -1, new_content_length);
    
    // check value 
	content_length = TSMimeHdrFieldValueUintGet(bufp, hdr_loc, length_field_loc, 0);
	TSDebug(DBG_TAG, "Content-Length check: %u", content_length);
} else {
    TSDebug(DBG_TAG, "Content-Length is not found");
}

ASSERT_SUCCESS(TSHandleMLocRelease(bufp, hdr_loc, length_field_loc));