Update instructions to include KfW build.

pkg/win32/README.txt

@@ -17,7 +17,7 @@ Choose the Desktop development with C++ option.
 
 4) Install various command line tools:
 
-choco install -y  bzip2 cmake diffutils gzip git innosetup nodejs-lts python strawberryperl wget yarn
+choco install -y  bzip2 cmake diffutils gawk gnuwin32-coreutils.install gzip git html-help-workshop innosetup nodejs-lts python sed strawberryperl wget yarn
 
 5) Upgrade pip (this may give a permissions error that can be ignored):
 
@@ -27,11 +27,16 @@ pip install --upgrade pip
 
 pip install virtualenv
 
+7) Add the following paths to the system PATH:
+
+C:\Program Files (x86)\GnuWin32\bin
+C:\Program Files (x86)\HTML Help Workshop
+
 Building dependencies
 =====================
 
 The following steps should be run from a Visual Studio 2017 64bit command
-prompt.
+prompt (except where noted).
 
 1) Create a directory for the dependencies:
 
@@ -63,7 +68,29 @@ files in C:\Program Files\Common Files\SSL. This is the default directory used
 for the OPENSSLDIR, and should not be changed to a directory that un-privileged
 users could potentially write to.
 
-4) Download the PostgreSQL source code, unpack and build it:
+4) Download the MIT Kerberos source code, unpack and build it:
+
+In a *32bit* Visual Studio 2017 command prompt:
+
+mkdir C:\build64\krb5
+cd krb5-1.18.3\src
+set KRB_INSTALL_DIR=C:\build64\krb5
+nmake -f Makefile.in prep-windows
+
+Optionally, if you want 32bit binaries as well as 64bit:
+
+nmake NODEBUG=1
+nmake install NODEBUG=1
+
+In a *64bit* Visual Studio 2017 command prompt:
+
+cd krb5-1.18.3\src
+set PATH=%PATH%;"%WindowsSdkVerBinPath%"\x86
+set KRB_INSTALL_DIR=C:\build64\krb5
+nmake NODEBUG=1
+nmake install NODEBUG=1
+
+5) Download the PostgreSQL source code, unpack and build it:
 
 wget https://ftp.postgresql.org/pub/source/v12.3/postgresql-12.3.tar.bz2
 tar -zxvf postgresql-12.3.tar.gz