crypto/tls: Minor issues with doc and error msgs

[gopherbot]

by jan.newmarch:

Which revision are you using?  (hg identify)
5a552276eca3 tip

Struggling a bit with tls due to these doco/error msg:

Doc for tls.LoadX509KeyPair should say the certfile and keyfile have to be PEM encoded.
Other encodings won't work.

c.sendAlert(alertBadCertificate)) occurs 8 times in handshake_client.go and
handshake_server.go. A detail field of which error caused the BadCert would help
debugging: I have a cert on a server which is accepted by "openssl s_client -tls1 
-connect localhost:1200" but not by tls.Dial, and tracking this down means reading
code rather than error messages.

[adg]

Comment 1:

Labels changed: added priority-low, removed priority-medium.

Owner changed to a...@golang.org.

Status changed to Accepted.

[agl]

Comment 2:

http://golang.org/cl/2380042/

Labels changed: added packagebug.

Status changed to Started.

[agl]

Comment 3:

This issue was closed by revision f6e2eab.

Status changed to Fixed.