Deleted specific bitcoin role.

Deleted specific build role.

Moved all to general apps role.

Make app_list list so tasks can iterate thru list and install each app

roles/apps/files/bitcoin/bin/btc_oneshot

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -ex
+
+# Generate bitcoin.conf
+btc_init
+
+# Default / no argument invocation listens for RPC commands and has to accept non-localhost because of
+# Docker port proxying or Docker private networking.
+if [ $# -eq 0 ]; then
+    # If IPv6 is in the container do both:
+    #set -- '-rpcbind=[::]:8332' '-rpcallowip=::/0' '-rpcallowip=0.0.0.0/0'
+    set -- '-rpcbind=:8332' '-rpcallowip=0.0.0.0/0'
+fi
+
+exec bitcoind "$@"