README.msys2: Add more information about missing packages

README.msys2

@@ -13,7 +13,7 @@ Steps to setup the build environment:
 
 4. Install pactoys for convenience:
 
-     $ pacman -S pactoys-git
+     $ pacman -S pactoys
 
 5. Install the toolchain:
 
@@ -32,10 +32,12 @@ From this point on it's a typical ninja build:
 
      $ cmake -DENABLE_CCACHE=Yes -DDISABLE_WERROR=Yes ..
 
-4. Instal missing dependencies using pacman (there are a few minor gaps) and
+4. Instal missing dependencies using pacman (there are a few gaps) and
    re-run cmake, e.g.:
 
-     $ pacboy -S glib2:x libpcap:x libgcrypt:x gnutls:x qt5:x
+     $ pacboy -S glib2:x libpcap:x libgcrypt:x gnutls:x qt5:x \
+     asciidoctor:x libssh:x libmaxminddb:x snappy:x spandsp:x \
+     libilbc:x doxygen:x winsparkle:x opus:x
 
 5. Build by running "ninja" in the build directory:
 
@@ -50,9 +52,15 @@ limitations:
 * The ETW extcap (etwdump) does not build.
 
 * Some optional dependencies are not available in the official MSYS2
-  repositories. These will be provided at a later date.
+  repositories. These are:
+    * AirPcap
+    * libsmi
+    * Kerberos
+    * Lua-unicode (Lua 5.1 is available and can be used instead)
+    * SBC codec
+    * BCG729 codec
 
-* Currently there is no Wireshark binary package available. More work is
+* There is no Wireshark binary package available. More work is
   needed to implement this. To be decided if it will use NSIS or something
   else.