[WIP] Support rustls as an alternative TLS backend

Author: jplatte

.github/workflows/sqlx.yml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     steps:
       - uses: actions/checkout@v2
 
@@ -144,7 +144,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     needs: check
     steps:
       - uses: actions/checkout@v2
@@ -180,7 +180,7 @@ jobs:
     strategy:
       matrix:
         postgres: [12, 10, 9_6, 9_5]
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     needs: check
     steps:
       - uses: actions/checkout@v2
@@ -232,7 +232,7 @@ jobs:
     strategy:
       matrix:
         mysql: [8, 5_7, 5_6]
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     needs: check
     steps:
       - uses: actions/checkout@v2
@@ -275,7 +275,7 @@ jobs:
     strategy:
       matrix:
         mariadb: [10_5, 10_4, 10_3, 10_2, 10_1]
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     needs: check
     steps:
       - uses: actions/checkout@v2
@@ -319,7 +319,7 @@ jobs:
     strategy:
       matrix:
         mssql: [2019]
-        runtime: [async-std, tokio, actix]
+        runtime: [async-std-native-tls, tokio-native-tls, actix-native-tls]
     needs: check
     steps:
       - uses: actions/checkout@v2