docs: rebrand documentation, packaging, and helper scripts to DragonX

The docs/packaging were largely un-rebranded Hush3 content, with several
docs stating facts that are wrong for DragonX. This rewrites them against
the verified DragonX source state.

Corrections (not just branding):
- PoW: RandomX (CPU), not Equihash/ASIC — README, overview.md, randomx.md
- Privacy: private from genesis (ac_private=1, Sapling@height1), not "as of
  block 340000" — overview.md, payment-api.md
- Removed the false "coinbase must be shielded" consensus claim
  (shield-coinbase.md, payment-api.md); coinbase is directly spendable
- Fixed default fee 0.0001 (was 0.0010000, 10x); stratum port 22769 (was 19031)
- datadir ~/.hush/DRAGONX, DRAGONX.conf, dragonxd/dragonx-cli/dragonx-tx,
  git.dragonx.is throughout; branch model dev->dragonx
- Softened the inherited dPoW reorg claim (no live DragonX notary infra)

Packaging: fix build-debian-package.sh + gen-manpages.sh to use the dragonx
binaries/manpages; rename bash-completions to dragonx*; drop hush-arrakis-chain
from the package. Keep /usr/share/hush (hardcoded in the binary for params).

Also: README links/logo, ObsidianDragon + SilentDragonXAndroid wallets,
networking/init/dev-process/contrib/util rebrand, and leftover helper scripts.
Delete legacy duplicates (hushd.* init/service, HUSH3.conf examples,
OLD_WALLETS.md, hsc.md) and rename hush-uri.bat -> dragonx-uri.bat.

Out of scope (noted, not changed): historical changelog/copyright, the Hush
mainnet airdrop snapshot, seed data files, depends/ source mirrors, and the
in-code strCurrencyUnits="HUSH".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

util/build-debian-package.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 # Copyright (c) 2016-2024 The Hush developers
+# Copyright (c) 2024-2026 The DragonX developers
 # Distributed under the GPLv3 software license, see the accompanying
 # file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 ## Usages:
@@ -15,7 +16,7 @@ else
 fi
 
 ARCH=${1:-amd64}
-echo "Let There Be Hush Debian Packages"
+echo "Let There Be DragonX Debian Packages"
 
 # Check if lintian is installed and give details about installing
 # It is an optional dependency
@@ -35,8 +36,8 @@ fi
 set -e
 set -x
 
-BUILD_PATH="/tmp/hush-debian-$$"
-PACKAGE_NAME="hush"
+BUILD_PATH="/tmp/dragonx-debian-$$"
+PACKAGE_NAME="dragonx"
 SRC_PATH=`pwd`
 SRC_DEB=$SRC_PATH/contrib/debian
 SRC_DOC=$SRC_PATH/doc
@@ -47,9 +48,9 @@ if [ ! -d $BUILD_PATH ]; then
     mkdir $BUILD_PATH
 fi
 
-# If hushd is not currently running, package version can be hardcoded
-#PACKAGE_VERSION=3.6.0
-PACKAGE_VERSION=$($SRC_PATH/src/hushd --version|grep version|cut -d' ' -f4|cut -d- -f1|sed 's/v//g')
+# If dragonxd is not currently running, package version can be hardcoded
+#PACKAGE_VERSION=1.0.3
+PACKAGE_VERSION=$($SRC_PATH/src/dragonxd --version|grep version|cut -d' ' -f4|cut -d- -f1|sed 's/v//g')
 DEBVERSION=$(echo $PACKAGE_VERSION | sed 's/-beta/~beta/' | sed 's/-rc/~rc/' | sed 's/-/+/')
 BUILD_DIR="$BUILD_PATH/$PACKAGE_NAME-$PACKAGE_VERSION-$ARCH"
 
@@ -61,6 +62,9 @@ DEB_BIN=$BUILD_DIR/usr/bin
 DEB_CMP=$BUILD_DIR/usr/share/bash-completion/completions
 DEB_DOC=$BUILD_DIR/usr/share/doc/$PACKAGE_NAME
 DEB_MAN=$BUILD_DIR/usr/share/man/man1
+# NOTE: /usr/share/hush is intentional and must NOT be renamed to /usr/share/dragonx.
+# The compiled binary hardcodes /usr/share/hush as the Debian global search path for the
+# sapling params and asmap.dat (see src/init.cpp and src/util.cpp).
 DEB_SHR=$BUILD_DIR/usr/share/hush
 mkdir -p $BUILD_DIR/DEBIAN $DEB_CMP $DEB_BIN $DEB_DOC $DEB_MAN $DEB_SHR
 chmod 0755 -R $BUILD_DIR/*
@@ -74,37 +78,36 @@ chmod 0755 -R $BUILD_DIR/*
 cp $SRC_PATH/contrib/asmap/asmap.dat $DEB_SHR
 cp $SRC_PATH/sapling-spend.params $DEB_SHR
 cp $SRC_PATH/sapling-output.params $DEB_SHR
-cp $SRC_PATH/src/hushd $DEB_BIN
-strip $DEB_BIN/hushd
-cp $SRC_PATH/src/hush-cli $DEB_BIN
-strip $DEB_BIN/hush-cli
-cp $SRC_PATH/src/hush-tx $DEB_BIN
-strip $DEB_BIN/hush-tx
+cp $SRC_PATH/src/dragonxd $DEB_BIN
+strip $DEB_BIN/dragonxd
+cp $SRC_PATH/src/dragonx-cli $DEB_BIN
+strip $DEB_BIN/dragonx-cli
+cp $SRC_PATH/src/dragonx-tx $DEB_BIN
+strip $DEB_BIN/dragonx-tx
 
-cp $SRC_PATH/src/hush-arrakis-chain $DEB_BIN
 cp $SRC_DEB/changelog $DEB_DOC
 cp $SRC_DEB/copyright $DEB_DOC
 cp -r $SRC_DEB/examples $DEB_DOC
 # Copy manpages
-cp $SRC_DOC/man/hushd.1 $DEB_MAN/hushd.1
-cp $SRC_DOC/man/hush-cli.1 $DEB_MAN/hush-cli.1
-cp $SRC_DOC/man/hush-tx.1 $DEB_MAN/hush-tx.1
+cp $SRC_DOC/man/dragonxd.1 $DEB_MAN/dragonxd.1
+cp $SRC_DOC/man/dragonx-cli.1 $DEB_MAN/dragonx-cli.1
+cp $SRC_DOC/man/dragonx-tx.1 $DEB_MAN/dragonx-tx.1
 
 # Copy bash completion files
-cp $SRC_PATH/contrib/hushd.bash-completion $DEB_CMP/hushd
-cp $SRC_PATH/contrib/hush-cli.bash-completion $DEB_CMP/hush-cli
-cp $SRC_PATH/contrib/hush-tx.bash-completion $DEB_CMP/hush-tx
+cp $SRC_PATH/contrib/dragonxd.bash-completion $DEB_CMP/dragonxd
+cp $SRC_PATH/contrib/dragonx-cli.bash-completion $DEB_CMP/dragonx-cli
+cp $SRC_PATH/contrib/dragonx-tx.bash-completion $DEB_CMP/dragonx-tx
 # Gzip files
 #gzip --best -n $DEB_DOC/changelog
 #gzip --best -n $DEB_DOC/changelog.Debian
-gzip --best -n $DEB_MAN/hushd.1
-gzip --best -n $DEB_MAN/hush-cli.1
-gzip --best -n $DEB_MAN/hush-tx.1
+gzip --best -n $DEB_MAN/dragonxd.1
+gzip --best -n $DEB_MAN/dragonx-cli.1
+gzip --best -n $DEB_MAN/dragonx-tx.1
 
 cd $SRC_PATH/contrib
 
 # Create the control file
-dpkg-shlibdeps $DEB_BIN/hushd $DEB_BIN/hush-cli $DEB_BIN/hush-tx
+dpkg-shlibdeps $DEB_BIN/dragonxd $DEB_BIN/dragonx-cli $DEB_BIN/dragonx-tx
 dpkg-gencontrol -P$BUILD_DIR -v$DEBVERSION
 #dpkg-gencontrol -P$BUILD_DIR