Feat report googlechat (#1257) (#1258)

* feat: Support Ubuntu21

* feat(report): Send report via Google Chat

* feat(report): Send report via Google Chat

* Snip too long message as (The rest is omitted).

* sorry for mixed feat-ubuntu21 branch. exlucded it

* append diff, attack vector and exploits info

* add ServerName filter by regexp

* rename variables and rewrite validators

* fix renaming miss

* fix renaming miss, again

config/config.go

@@ -42,16 +42,17 @@ type Config struct {
 	Exploit    ExploitConf    `json:"exploit,omitempty"`
 	Metasploit MetasploitConf `json:"metasploit,omitempty"`
 
-	Slack    SlackConf    `json:"-"`
-	EMail    SMTPConf     `json:"-"`
-	HTTP     HTTPConf     `json:"-"`
-	Syslog   SyslogConf   `json:"-"`
-	AWS      AWSConf      `json:"-"`
-	Azure    AzureConf    `json:"-"`
-	ChatWork ChatWorkConf `json:"-"`
-	Telegram TelegramConf `json:"-"`
-	WpScan   WpScanConf   `json:"-"`
-	Saas     SaasConf     `json:"-"`
+	Slack      SlackConf      `json:"-"`
+	EMail      SMTPConf       `json:"-"`
+	HTTP       HTTPConf       `json:"-"`
+	Syslog     SyslogConf     `json:"-"`
+	AWS        AWSConf        `json:"-"`
+	Azure      AzureConf      `json:"-"`
+	ChatWork   ChatWorkConf   `json:"-"`
+	GoogleChat GoogleChatConf `json:"-"`
+	Telegram   TelegramConf   `json:"-"`
+	WpScan     WpScanConf     `json:"-"`
+	Saas       SaasConf       `json:"-"`
 
 	ReportOpts
 }
@@ -157,6 +158,7 @@ func (c *Config) ValidateOnReport() bool {
 		&c.EMail,
 		&c.Slack,
 		&c.ChatWork,
+		&c.GoogleChat,
 		&c.Telegram,
 		&c.Syslog,
 		&c.HTTP,