log_console_details.php: use standard array joining
log_console_details.php: use standard array joining

Use the `join` function to join an array with a delimiter instead
of reimplementing it. This also fixes an undefined variable PHP
warning.

smrealms/smr,hemberger/smr,hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr,hemberger/smr