When adding cameras via ONVIF probe, passwords containing special
characters (like parentheses, slashes, etc.) were being stored in the
database in URL-encoded form instead of plain text. This caused
authentication failures when the encoded password was used.
The issue was in extract_auth_values_from_url() which extracted
credentials from the stream URI but didn't decode them. Since the ONVIF
probe process double-encodes passwords (to survive POST encoding), and
monitor.php decodes once, the extracted password still remained
URL-encoded.
The fix adds urldecode() to both username and password after extraction,
ensuring they're stored in their original form in the database.
Example: Password "pass)word" was being stored as "pass%29word"