check_ssl_cert: integrate new option to set maximum validity

doc/10-icinga-template-library.md

@@ -5834,6 +5834,7 @@ ssl_cert_proxy                | **Optional.** Proxy server to use for connecting
 ssl_cert_file                 | **Optional.** Local file path. Works only if `ssl_cert_address` is set to "localhost".
 ssl_cert_warn                 | **Optional.** Minimum number of days a certificate has to be valid.
 ssl_cert_critical             | **Optional.** Minimum number of days a certificate has to be valid to issue a critical status.
+ssl_cert_maximum_validity     | **Optional.** Maximum number of days a certificate is allowed to be valid (default: 397)
 ssl_cert_cn                   | **Optional.** Pattern to match the CN or AltName of the certificate.
 ssl_cert_issuer               | **Optional.** Pattern to match the issuer of the certificate.
 ssl_cert_org                  | **Optional.** Pattern to match the organization of the certificate.

itl/plugins-contrib.d/web.conf

@@ -578,6 +578,10 @@ object CheckCommand "ssl_cert" {
 			set_if = "$ssl_cert_ignore_tls_renegotiation$"
 			description = "Do not check for renegotiation"
 		}
+		"--maximum-validity" = {                                                                                                                                                                                                                                                        
+			value = "$ssl_cert_maximum_validity$"                                                                                                                                                                                                                                       
+			description = "The maximum validity of the certificate in days (default: 397)"                                                                                                                                                                                
+		}                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
 
 	}