mquery USE_THRED "Enable threadsafe operation?" y "--enable-threadsafe" "--disable-threadsafe"
mquery USE_SEC_DEL "Enable secure delete operations? (Needed by xulrunner)" y
mquery USE_EXTENT "Support loadable extensions?" y "--enable-dynamic-extensions" "--disable-dynamic-extensions"
mquery USE_UNLOCK "Enable Unlock Notify support? (can be used by libzdb)" y
