Upgrade to deltachat v1.50.0

README.md

@@ -7,7 +7,7 @@ email - which is to say, SMTP+IMAP.
 
 Delta has:
 
-* A mature [core library](https://github.com/deltachat/deltachat-core)
+* A mature [core library](https://github.com/deltachat/deltachat-core-rust)
 * A mature [Android application](https://github.com/deltachat/deltachat-android)
 * An experimental [iOS application](https://github.com/deltachat/deltachat-ios)
 * An electron [desktop application](https://github.com/deltachat/deltachat-desktop)
@@ -22,22 +22,21 @@ Current status is probably best described as "skunkworks", although connecting
 to an account and sending / receiving text messages should work reliably. You
 can view specific progress on [the issue board](https://gitlab.com/lupine/purple-plugin-delta/boards).
 
+We currrently build against deltachat v1.50.0. You'll need to build and install
+deltachat-ffi separately and ensure that it's available via `pkg-config` for
+deltachat to install.
+
 ## Build
 
 There are some licensing issues at present, so you shouldn't build this plugin.
 
-`deltachat-core` vendors openssl, unconditionally links it, and is MPL-licensed.
+`deltachat-core-rust` uses a vendored openssl 1, unconditionally links it, and
+is MPL-licensed.
 
 `purple-plugin-delta` is GPLv3 without the [OpenSSL exemption](https://people.gnome.org/~markmc/openssl-and-the-gpl.html)
 
 `libpurple` itself is GPLv2 without the OpenSSL exemption.
 
-`deltachat-core-rust` may make OpenSSL optional, so linking against that version
-would be fine.
-
-Linking against a patched / changed `deltachat-core` that disregards vendored
-OpenSSL and uses GnuTLS instead would also be fine.
-
 There's no point to `purple-plugin-delta` adding the OpenSSL exemption because
 `libpurple` lacks it, and in any event, it will be unnecessary with the next
 major version of OpenSSL. So, time should resolve this for us one way or another.