Hello Trigun
now it is possible to connect to a owncloud webdav server using a self signed certificate.
Make sure you are using .crt or .pem file format. If you are using .pem format the certificate file should look like this:
-----BEGIN CERTIFICATE-----
MIIDaTCCAlECBFDsGscwDQYJKoZIhvcNAQEFBQAweTEYMBYGCSqGSIb3DQEJARYJ
YmNAYmMuY29tMQswCQYDVQQGEwJERTEMMAoGA1UECAwDYmM0MQwwCgYDVQQHDANi
YzMxDDAKBgNVBAoMA2JjMjEMMAoGA1UECwwDYmMxMRgwFgYDVQQDDA8xOTIuMTY4
LjE3OC4xMTQwHhcNMTMwMTA4MTMxMDMxWhcNMTQwMTA4MTMxMDMxWjB5MRgwFgYJ
KoZIhvcNAQkBFgliY0BiYy5jb20xCzAJBgNVBAYTAkRFMQwwCgYDVQQIDANiYzQx
DDAKBgNVBAcMA2JjMzEMMAoGA1UECgwDYmMyMQwwCgYDVQQLDANiYzExGDAWBgNV
BAMMDzE5Mi4xNjguMTc4LjExNDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC
ggEBAIJ1r99JedniM2asNrSNaDNDIavRlZSarnMKLNXBqyYomO00WpZJJeinJYUk
......
AFWyw/bDktUtFWw/X8ysvxOyFx/3M5+qBp8JV9iIj+C0qP8VohsiBhhUIMyUKvYq
DvywpoVSNVj4q1XZU+2FLpDe6F8CAwEAATANBgkqhkiG9w0BAQUFAAOCAQEAROFL
XZCAnCMsfgzfnbHYG+1twfOyBHe6tNvLpLQBiNM0Uiw35H7tQkeuXRK0RSgqNtOb
PzqhVLW9XVbtFvFnGtUugK/HsKoqgqSkfcZwMtGPoC+H38+QlA+eScVqGljfOeZV
hYjz/sBxfkiZzHY2XP3l476USuHd1PcV4dUFZoQxOX3jnQMtZ7CQsrppJzYVCmU+
njOKNH4/Rj8Nn6a+YuBDR8QlF6ffxAX7mI34EnkMzukX/SlIsn7Ia+vaTXkAbQZA
RBKTNu4iBF6ZJLmsgcCor4i0aF8iAdhtZngYvjgWXTSzlxkiCwRV/kW9gLgcANu3
u9VMexSGZBETYZf0CA==
-----END CERTIFICATE-----
Best regards
Boris