Control: tags -1 + patch kannel does build successfully with libssl-dev in my sid builder, i.e. with this patch:
diff --git a/kannel-1.4.4/debian/control b/kannel-1.4.4/debian/control index a0148e7..7a2311c 100644 --- a/kannel-1.4.4/debian/control +++ b/kannel-1.4.4/debian/control @@ -8,7 +8,7 @@ Build-Depends: cdbs, dh-autoreconf, debhelper, libxml2-dev, - libssl1.0-dev | libssl-dev (<< 1.1~), + libssl-dev, openssl, default-libmysqlclient-dev | libmysqlclient-dev, libsqlite0-dev, @@ -86,7 +86,7 @@ Architecture: any Section: devel Depends: ${misc:Depends}, - libssl1.0-dev | libssl-dev (<< 1.1~), + libssl-dev, libpam0g-dev, libxml2-dev, libpcre3-dev, Cheers.