Description:
The systemd service file for transmission-daemon only has an After=network.target. This can result in Transmission starting before all interfaces are fully configured, which can be problematic if it is configured to bind to a specific address. In my case, this resulted in an error being logged on start-up and Transmission being unable to down- or upload until restarted.


Additional info:
* Version: transmission-cli 3.00-3
* Command line flags: --bind-address-ipv4 172.31.0.2 --bind-address-ipv6 fd00::2
* Log output: Couldn't bind port [...] on 172.31.0.2: Cannot assign request address (net.c:452)
* Upstream issue: https://github.com/transmission/transmission/issues/2720

Steps to reproduce:
* Configure Transmission to bind a to a specific address
* Enable transmission.service
* Maybe artificially delay network configuration somehow, e.g. by adding an ExecStartPre=sleep to your network manager service