Azure Pipelines: refactoring, adding windows target

.azure-pipelines.yml

@@ -1,19 +1,6 @@
-pool:
-  vmImage: 'Ubuntu 16.04'
-  
-variables:
-  CPACK_GENERATOR: DEB
+jobs:
+  - template: .ci/azure-pipelines-linux.yml
 
-steps:
-- checkout: self  
-  submodules: recursive
+#  - template: .ci/azure-pipelines-osx.yml
 
-- script: |
-    sudo apt -y install cmake gcc g++ libncurses5-dev libreadline-dev libssl-dev make zlib1g-dev
-    ./configure
-    make package -C tmp -j $(nproc || sysctl -n hw.ncpu || echo 4)
-    .ci/appveyor-deb-install-test.sh
-    sudo apt-get -y install autoconf libtool liblzo2-dev libpam-dev fping unzip # openvpn build deps
-    sudo .ci/start-se-openvpn.sh
-    sudo .ci/run-openvpn-tests.sh
-  displayName: 'Ubuntu 16.04'
+  - template: .ci/azure-pipelines-win.yml