Make sure that we're comparing text all the way through.

On Darwin, sys.platform returns byte strings on both python2 and
python3.  Turn it into a text string everywhere in order to remedy that.

Fixes #19845

lib/ansible/module_utils/urls.py

@@ -115,7 +115,7 @@ import ansible.module_utils.six.moves.urllib.request as urllib_request
 import ansible.module_utils.six.moves.urllib.error as urllib_error
 from ansible.module_utils.basic import get_distribution, get_exception
 from ansible.module_utils.six import b
-from ansible.module_utils._text import to_bytes, to_native
+from ansible.module_utils._text import to_bytes, to_native, to_text
 
 try:
     # python3
@@ -579,21 +579,21 @@ class SSLValidationHandler(urllib_request.BaseHandler):
         ca_certs = []
         paths_checked = []
 
-        system = platform.system()
+        system = to_text(platform.system(), errors='surrogate_or_strict')
         # build a list of paths to check for .crt/.pem files
         # based on the platform type
         paths_checked.append('/etc/ssl/certs')
-        if system == 'Linux':
+        if system == u'Linux':
             paths_checked.append('/etc/pki/ca-trust/extracted/pem')
             paths_checked.append('/etc/pki/tls/certs')
             paths_checked.append('/usr/share/ca-certificates/cacert.org')
-        elif system == 'FreeBSD':
+        elif system == u'FreeBSD':
             paths_checked.append('/usr/local/share/certs')
-        elif system == 'OpenBSD':
+        elif system == u'OpenBSD':
             paths_checked.append('/etc/ssl')
-        elif system == 'NetBSD':
+        elif system == u'NetBSD':
             ca_certs.append('/etc/openssl/certs')
-        elif system == 'SunOS':
+        elif system == u'SunOS':
             paths_checked.append('/opt/local/etc/openssl/certs')
 
         # fall back to a user-deployed cert in a standard
@@ -605,7 +605,7 @@ class SSLValidationHandler(urllib_request.BaseHandler):
         to_add = False
 
         # Write the dummy ca cert if we are running on Mac OS X
-        if system == 'Darwin':
+        if system == u'Darwin':
             os.write(tmp_fd, b_DUMMY_CA_CERT)
             # Default Homebrew path for OpenSSL certs
             paths_checked.append('/usr/local/etc/openssl')