LibPSL missing for CURL build?

[Undrog]

I noticed following the bake output while building curl:

#49 2.924 -- Could NOT find LibPSL (missing: LIBPSL_LIBRARY LIBPSL_INCLUDE_DIR) 
#49 2.929 -- Could NOT find LibSSH2 (missing: LIBSSH2_LIBRARY LIBSSH2_INCLUDE_DIR) 

I guess libssh2 being missing is of no consequence as this implementation will not be using CURL to access scp/sftp endpoints, but I'd imagine there might be scenarios where missing LibPSL could be an issue?