Add SmtpLib to Frameworks.qll and minimal fixes

Author: jorgectf

python/ql/src/experimental/semmle/python/Frameworks.qll

@@ -9,6 +9,7 @@ private import experimental.semmle.python.frameworks.Werkzeug
 private import experimental.semmle.python.frameworks.LDAP
 private import experimental.semmle.python.frameworks.NoSQL
 private import experimental.semmle.python.frameworks.Log
-private import experimental.semmle.python.libraries.FlaskMail
 private import experimental.semmle.python.frameworks.Django
 private import experimental.semmle.python.frameworks.Sendgrid
+private import experimental.semmle.python.libraries.FlaskMail
+private import experimental.semmle.python.libraries.SmtpLib

python/ql/src/experimental/semmle/python/frameworks/Django.qll

@@ -8,7 +8,7 @@ private import semmle.python.frameworks.Django
 private import semmle.python.dataflow.new.DataFlow
 private import experimental.semmle.python.Concepts
 private import semmle.python.ApiGraphs
-import semmle.python.dataflow.new.RemoteFlowSources
+private import semmle.python.dataflow.new.RemoteFlowSources
 
 private module PrivateDjango {
   private module django {
@@ -112,7 +112,7 @@ private module PrivateDjango {
        * * `getFrom()`'s result would be `"from@example.com"`.
        * * `getSubject()`'s result would be `"Subject"`.
        */
-      private class DjangoSendMail extends DataFlow::CallCfgNode, EmailSender {
+      private class DjangoSendMail extends DataFlow::CallCfgNode, EmailSender::Range {
         DjangoSendMail() { this = djangoMail().getMember("send_mail").getACall() }
 
         override DataFlow::Node getPlainTextBody() {
@@ -152,7 +152,7 @@ private module PrivateDjango {
        * * `getFrom()`'s result would be `none`.
        * * `getSubject()`'s result would be `"Subject"`.
        */
-      private class DjangoMailInternal extends DataFlow::CallCfgNode, EmailSender {
+      private class DjangoMailInternal extends DataFlow::CallCfgNode, EmailSender::Range {
         DjangoMailInternal() {
           this = djangoMail().getMember(["mail_admins", "mail_managers"]).getACall()
         }

python/ql/src/experimental/semmle/python/frameworks/Sendgrid.qll

@@ -83,7 +83,7 @@ private module Sendgrid {
    * * `getFrom()`'s result would be `"from@example.com"`.
    * * `getSubject()`'s result would be `"Sending with SendGrid is Fun"`.
    */
-  private class SendGridMail extends DataFlow::CallCfgNode, EmailSender {
+  private class SendGridMail extends DataFlow::CallCfgNode, EmailSender::Range {
     SendGridMail() { this.getFunction() = sendgridApiSendCall() }
 
     override DataFlow::Node getPlainTextBody() {

python/ql/src/experimental/semmle/python/libraries/FlaskMail.qll

@@ -67,7 +67,7 @@ private module FlaskMail {
    * * `getFrom()`'s result would be `"from@example.com"`.
    * * `getSubject()`'s result would be `"Subject"`.
    */
-  private class FlaskMail extends DataFlow::CallCfgNode, EmailSender {
+  private class FlaskMail extends DataFlow::CallCfgNode, EmailSender::Range {
     FlaskMail() {
       this =
         [flaskMailInstance(), flaskMailInstance().getMember("connect").getReturn()]