Merge #21418: contrib: Make systemd invoke dependencies only when ready

663f6cd9dd contrib: Use -daemonwait in systemd init script (Wladimir J. van der Laan)

Pull request description:

  Make systemd invoke dependencies only when ready by using `-daemonwait` in the service file instead of `-daemon`.

  Closes #21322 by making bitcoind conform to behavior specified for `type=forking`.

  This may need some tuning of timeouts.

ACKs for top commit:
  darosior:
    ACK 663f6cd
  hebasto:
    re-ACK 663f6cd9dd

Tree-SHA512: 890005852b632a202caa578e6c796ebdc9da0b2379a9157a4f56f7db9d193c0ffbb78d120bbf112ab2f273855f2a08c3da000b1f7a9fb5222a3b94dcdb16b878

contrib/init/bitcoind.service

@@ -18,7 +18,7 @@ After=network-online.target
 Wants=network-online.target
 
 [Service]
-ExecStart=/usr/bin/bitcoind -daemon \
+ExecStart=/usr/bin/bitcoind -daemonwait \
                             -pid=/run/bitcoind/bitcoind.pid \
                             -conf=/etc/bitcoin/bitcoin.conf \
                             -datadir=/var/lib/bitcoind
@@ -33,6 +33,7 @@ ExecStartPre=/bin/chgrp bitcoin /etc/bitcoin
 Type=forking
 PIDFile=/run/bitcoind/bitcoind.pid
 Restart=on-failure
+TimeoutStartSec=infinity
 TimeoutStopSec=600
 
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