certs/samba: Add CAs to Samba certificate chain

For reasons that totally elude me, Gitea LDAP authentication suddenly
stopped working, citing an error about not trusting the server's
certificate.  I thought this was probably some change in a recent
version of Gitea or Go that changed how the system trust store was used,
but it turned out the problem was actually that Samba was not sending
the intermediate CA certificate.  I am not sure if this was always the
case, and the fact that it worked before was a coincidence, or if
something changed in Samba.  In any case, the fix was (apparently) to
include the intermediate and root CA certificates in the server
certificate file.

certs/samba/dc0.pyrocufflink.blue/samba.cer

@@ -126,3 +126,68 @@ kBGm2i/YQWSryKGGG74fIOuQnMLtMLm4soWN+i6VTBHJUi6uNYGdFjuMvHdwbpfF
 HjJ5QUP0jxJQwNgwUWr4jjRhOh6959C6P4LVhazGQO8peHDSssnJaBjBY8fFW1wH
 q2BZqXWJP31wOBLai/rKwoaTnTH4UMPrh27xK7/a
 -----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----