Revert "transmission: Update to 2.93 + fixes"

This reverts commit 606f615048.

The commit broke the patches:
> Applying ./patches/020-use-internal-miniupnp.patch using plaintext:
> patching file configure.ac
> Hunk #1 succeeded at 378 (offset -8 lines).
>
> Applying ./patches/040-fix-for-mbedtls.patch using plaintext:
> patching file configure.ac
> Hunk #1 FAILED at 154.
> 1 out of 1 hunk FAILED -- saving rejects to file configure.ac.rej

net/transmission/files/transmission.init

@@ -95,7 +95,7 @@ transmission() {
 			speed_limit_down speed_limit_down_enabled speed_limit_up \
 			speed_limit_up_enabled start_added_torrents trash_original_torrent_files \
 			umask upload_slots_per_torrent utp_enabled scrape_paused_torrents \
-			watch_dir_enabled rpc_host_whitelist_enabled
+			watch_dir_enabled
 
 		append_params_quotes "$cfg" \
 			blocklist_url bind_address_ipv4 bind_address_ipv6 download_dir incomplete_dir \
@@ -113,7 +113,6 @@ transmission() {
 	procd_set_param command $cmdline
 	procd_set_param respawn retry=60
 	procd_set_param user "$user"
-	procd_set_param group "$user"
 	procd_set_param nice "$nice"
 	if test -z "$USE";then
 		procd_set_param limits core="0 0"