update and mask unit tests when running on win32

Update pq_test to ignore changes in whitespace.
Update for new testssl params, specify absolute paths to test binaries.
Fork-based tests do not make sense on Windows.
Disable building biotest, since it is too specific to OpenBSD's behavior
to be useful on other platforms.

tests/aeadtest.sh

@@ -1,3 +1,7 @@
 #!/bin/sh
 set -e
-./aeadtest $srcdir/aeadtests.txt
+TEST=./aeadtest
+if [ -e ./aeadtest.exe ]; then
+	TEST=./aeadtest.exe
+fi
+$TEST $srcdir/aeadtests.txt

tests/evptest.sh

@@ -1,3 +1,7 @@
 #!/bin/sh
 set -e
-./evptest $srcdir/evptests.txt
+TEST=./evptest
+if [ -e ./evptest.exe ]; then
+	TEST=./evptest.exe
+fi
+$TEST $srcdir/evptests.txt

tests/pq_test.sh

@@ -1,3 +1,7 @@
 #!/bin/sh
 set -e
-./pq_test | cmp $srcdir/pq_expected.txt -
+TEST=./pq_test
+if [ -e ./pq_test.exe ]; then
+	TEST=./pq_test.exe
+fi
+$TEST | diff -b $srcdir/pq_expected.txt -

tests/ssltest.sh

@@ -1,5 +1,19 @@
 #!/bin/sh
 set -e
-PATH=../apps:$PATH
-export PATH
-$srcdir/testssl $srcdir/server.pem $srcdir/server.pem $srcdir/ca.pem
+
+ssltest_bin=./ssltest
+if [ -e ./ssltest.exe ]; then
+	ssltest_bin=./ssltest.exe
+fi
+
+openssl_bin=../apps/openssl
+if [ -e ../apps/openssl.exe ]; then
+	openssl_bin=../apps/openssl.exe
+fi
+
+if [ -z $srcdir ]; then
+	srcdir=.
+fi
+
+$srcdir/testssl $srcdir/server.pem $srcdir/server.pem $srcdir/ca.pem \
+	$ssltest_bin $openssl_bin