Correct typo in attribute 'ignore_ssl_error'

[admins-little-helper]

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• I've read the contribution guidelines and wholeheartedly agree them

What does this PR include?

Short Description

The API endpoint '/get/identity-provider' returns an invalid attribute 'ignore_ssl_errors' (plural) in addition to the valid attribute 'ignore_ssl_error' (singular).
This seems to be a typo in /data/web/inc/functions.inc.php. The 'edit/identity-provider' API endpoint expects 'ignore_ssl_error'.
The consequence of this typo is that:

• an invalid attribute is returned in addition to the valid attribute name on an API call to '/get/identity-provider'.
• the valid attribute name is not correctly casted to a boolean value as intended.

Affected Containers

N/A

Did you run tests?

What did you tested?

curl -X GET https://mail.example.com/api/v1/get/identity-provider -H "accept: application/json" -H  "X-API-Key: apikey"

The result contains attribute 'ignore_ssl_error' set to an empty string (line 11) and 'ignore_ssl_errors' in line 25.

{
    "access_token": "",
    "attribute_field": "extensionattribute15",
    "authsource": "ldap",
    "basedn": "DC=domain,DC=local",
    "binddn": "CN=svc-ldap,OU=ServiceAccounts,DC=domain,DC=local",
    "bindpass": "securepassword",
    "default_template": "Default",
    "filter": "(&(objectClass=user)(mail=*example.com))",
    "host": "False",
    "ignore_ssl_error": "",
    "import_users": "1",
    "login_provisioning": true,
    "mappers": [
        "mailcow"
    ],
    "periodic_sync": "1",
    "port": "389",
    "sync_interval": "2",
    "templates": [
        "example.com"
    ],
    "username_field": "mail",
    "use_ssl": false,
    "use_tls": false,
    "ignore_ssl_errors": false
}

What were the final results? (Awaited, got)

After applying the fix, an API call to 'get/identity-provider' returns the following correct results.
The attribute value of 'ignore_ssl_error' correctly shows 'false' instead of an empty string (line 11).
The invalid attribute name 'ignore_ssl_errors' is no longer returned.

{
    "access_token": "",
    "attribute_field": "extensionattribute15",
    "authsource": "ldap",
    "basedn": "DC=domain,DC=local",
    "binddn": "CN=svc-ldap,OU=ServiceAccounts,DC=domain,DC=local",
    "bindpass": "securepassword",
    "default_template": "Default",
    "filter": "(&(objectClass=user)(mail=*example.com))",
    "host": "False",
    "ignore_ssl_error": false,
    "import_users": "1",
    "login_provisioning": true,
    "mappers": [
        "mailcow"
    ],
    "periodic_sync": "1",
    "port": "389",
    "sync_interval": "2",
    "templates": [
        "example.com"
    ],
    "username_field": "mail",
    "use_ssl": false,
    "use_tls": false
}