Strengthen warning in CONFIGURE.md

CONFIGURE.md

@@ -133,6 +133,9 @@ If `OQS_HAZARDOUS_EXPERIMENTAL_ENABLE_SIG_STFL_KEY_SIG_GEN` is `OFF` signature v
 Standards bodies, such as NIST, recommend that key and signature generation only by done in hardware in order to best enforce the one-time use of secret keys.
 Keys stored in a file system are extremely susceptible to simultaneous use.
 When enabled in this library a warning message will be generated by the config process.
+The name of the configuration variable has been chosen to make every user of this feature aware of its security risks.
+The OQS team explicitly discourages enabling this variable and reserves the right to remove this feature in future releases if its use causes actual harm.
+It remains present as long as it is responsibly used as per the stated warnings.
 
 By default,
 - `OQS_ENABLE_SIG_STFL_XMSS` is `OFF`