for apidiff, generate apidiff/next.txt and rotate it on release

instead of already giving it a version name before the release. the released
version could be different.

Makefile

@@ -122,7 +122,7 @@ webaccount/account.js: lib.ts webaccount/api.ts webaccount/account.ts
 frontend: webadmin/admin.js webaccount/account.js webmail/webmail.js webmail/msg.js webmail/text.js
 
 genapidiff:
-	# needs file next.txt containing next version number, and golang.org/x/exp/cmd/[email protected] installed
+	# needs golang.org/x/exp/cmd/[email protected] installed
 	./apidiff.sh
 
 docker:

apidiff.sh

@@ -2,24 +2,23 @@
 set -e
 
 prevversion=$(go list -mod=readonly -m -f '{{ .Version }}' github.com/mjl-/mox@latest)
-nextversion=$(cat next.txt)
 if ! test -d tmp/mox-$prevversion; then
 	mkdir -p tmp/mox-$prevversion
 	git archive --format=tar $prevversion | tar -C tmp/mox-$prevversion -xf -
 fi
 (rm -r tmp/apidiff || exit 0)
 mkdir -p tmp/apidiff/$prevversion tmp/apidiff/next
-(rm apidiff/$nextversion.txt || exit 0)
+(rm apidiff/next.txt || exit 0)
 (
-echo "Below are the incompatible changes between $prevversion and $nextversion, per package."
+echo "Below are the incompatible changes between $prevversion and next, per package."
 echo
-) >>apidiff/$nextversion.txt
+) >>apidiff/next.txt
 for p in $(cat apidiff/packages.txt); do
 	(cd tmp/mox-$prevversion && apidiff -w ../apidiff/$prevversion/$p.api ./$p)
 	apidiff -w tmp/apidiff/next/$p.api ./$p
 	(
 	echo '#' $p
 	apidiff -incompatible tmp/apidiff/$prevversion/$p.api tmp/apidiff/next/$p.api
 	echo
-	) >>apidiff/$nextversion.txt
+	) >>apidiff/next.txt
 done

apidiff/next.txt

@@ -0,0 +1,38 @@
+Below are the incompatible changes between v0.0.10 and next, per package.
+
+# dane
+
+# dmarc
+
+# dmarcrpt
+
+# dns
+
+# dnsbl
+
+# iprev
+
+# message
+
+# mtasts
+
+# publicsuffix
+
+# ratelimit
+
+# sasl
+
+# scram
+
+# smtp
+
+# smtpclient
+
+# spf
+
+# subjectpass
+
+# tlsrpt
+
+# updates
+

develop.txt

@@ -288,6 +288,7 @@ done
 - Send and receive email with imap4/smtp clients.
 - Check DNS check admin page.
 - Check with https://internet.nl.
+- Move apidiff/next.txt to apidiff/<version>.txt, and create empty next.txt.
 - Add release to the Latest release & News sections of website/index.md.
 - Create git tag, push code.
 - Publish new docker image.
@@ -298,3 +299,4 @@ done
   instructions to prevent confusion about "assets" github links to.
 - Publish new cross-referenced code/rfc to www.xmox.nl/xr/.
 - Update moxtools with latest version.
+- Update implementations support matrix.