message: Add ./autogen.sh and mention installing curl.
diff: @@ -305,13 +305,14 @@ scanelf -e ./bitcoind
  If you want to build statically linked binaries so that you could compile in one machine
  and deploy in same parch/platform boxes without the need of installing all the dependencies
  -just follow these steps:
  +just follow these steps. You will need to install `curl`.
  ```bash
  git clone https://github.com/BitcoinUnlimited/BitcoinUnlimited.git BU
  cd BU/depends
  make HOST=x86_64-pc-linux-gnu NO_QT=1 -j4
  cd ..
  +./autogen.sh
  ./configure --prefix=$PWD/depends/x86_64-pc-linux-gnu --without-gui
  make -j4
  ```
  @@ -338,6 +339,7 @@ To build executables for ARM:
  cd depends
  make HOST=arm-linux-gnueabihf NO_QT=1
  cd ..
  +./autogen.sh
  ./configure --prefix=$PWD/depends/arm-linux-gnueabihf --enable-glibc-back-compat --enable-reduce-exports LDFLAGS=-static-libstdc++
  make
  ```
  