hs20: prepare server using uci-defaults and ship files

Setup user database if non-existent, configure uhttpd .php interpreter
and patch php scripts to work out-of-the-box.
Also ship Hotspot 2.0 SPP and OMA DM XML schema/DTD files needed at
run-time for both client and server.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

net/hs20/patches/300-paths-in-ca-setup-sh.patch

@@ -0,0 +1,24 @@
+--- a/hs20/server/ca/setup.sh
++++ b/hs20/server/ca/setup.sh
+@@ -3,7 +3,7 @@
+ if [ -z "$OPENSSL" ]; then
+     OPENSSL=openssl
+ fi
+-export OPENSSL_CONF=$PWD/openssl.cnf
++export OPENSSL_CONF=/usr/share/hs20/ca/openssl.cnf
+ PASS=whatever
+ if [ -z "$DOMAIN" ]; then
+     DOMAIN=w1.fi
+@@ -83,10 +83,10 @@ then
+ fi
+ 
+ # Set the passphrase and some other common config accordingly.
+-cat openssl-root.cnf | sed "s/@PASSWORD@/$PASS/" \
++cat /usr/share/hs20/ca/openssl-root.cnf | sed "s/@PASSWORD@/$PASS/" \
+  > my-openssl-root.cnf
+ 
+-cat openssl.cnf | sed "s/@PASSWORD@/$PASS/" |
++cat /usr/share/hs20/ca/openssl.cnf | sed "s/@PASSWORD@/$PASS/" |
+ sed "s,@OCSP_URI@,$OCSP_URI," |
+ sed "s,@LOGO_URI@,$LOGO_URI," |
+ sed "s,@LOGO_HASH1@,$LOGO_HASH1," |