add option insecure

Allow insecure server connections when using SSL

README.md

@@ -56,6 +56,9 @@ htpdate -s www.pool.ntp.org
  -i, --interval         The minimum milliseconds between requests
                         Default: 500
 
+ -k, --insecure         Allow insecure server connections when using SSL
+                        Default: false
+
  -m, --method           HTTP method
                         Default: 'HEAD'
 

index.coffee

@@ -53,6 +53,12 @@ argv = require('./argv') {
     default: 6000
     type: 'number'
   }
+  insecure: {
+    describe: 'Allow insecure server connections when using SSL'
+    alias: 'k'
+    default: false
+    type: 'boolean'
+  }
   command: {
     describe: 'Command to adjust system time, in https://day.js.org/ display format'
     alias: 'C'
@@ -84,6 +90,9 @@ req_opt = {
   headers: {
     'user-agent': argv['user-agent']
   }
+  https: {
+    rejectUnauthorized: not argv.insecure
+  }
 }