component/proftpd: version ↑ 1.3.6b

1.3.6a had a fix for building mod_sftp using OpenSSL 1.1.x, so we can
use default openssl again.
This should fix problems with proftpd-mod_auth_web that was linked
against curl which already used openssl 1.1

component/proftpd/buildout.cfg

@@ -22,11 +22,8 @@ recipe = collective.recipe.grp
 
 [proftpd]
 recipe = slapos.recipe.cmmi
-md5sum = 13270911c42aac842435f18205546a1b
-url = ftp://ftp.proftpd.org/distrib/source/proftpd-1.3.6.tar.gz
-# 1.3.6 is not compatible with openssl 1.1.x
-# https://github.com/proftpd/proftpd/issues/674
-# (fix is in master, we are waiting for next release)
+md5sum = 4040f6a6b86173e2a03f4ccdb9b9af6e
+url = ftp://ftp.proftpd.org/distrib/source/proftpd-1.3.6b.tar.gz
 configure-options =
   --enable-openssl
   --enable-nls
@@ -39,8 +36,8 @@ environment =
   LDFLAGS=${:ldflags}
   install_user=${proftpd-environment:USER}
   install_group=${proftpd-grp:GROUP}
-cppflags=-I${zlib:location}/include -I${openssl-1.0:location}/include
-ldflags=-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${openssl-1.0:location}/lib -Wl,-rpath=${openssl-1.0:location}/lib
+cppflags=-I${zlib:location}/include -I${openssl:location}/include
+ldflags=-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib
 patch-binary = ${patch:location}/bin/patch
 patch-options = -p1
 patches =