SSHConfig.parse messes up when host is different from hostname

I guess this is a bug.

paramiko.config.SSHConfig.parse messes up if host is different from hostname in the shh config file.

Host host1
  HostName 11.222.333.444
  User username
  IdentityFile C:\Users\xxx\ssh\id_rsa

returns:
{'hostname': '11.222.333.444'}
which is missing some variables

Host 11.222.333.444
  HostName 11.222.333.444
  User username
  IdentityFile C:\Users\xxx\ssh\id_rsa

returns:
{'hostname': '11.222.333.444', 'identityfile': ['C:\Users\xxx\ssh\id_rsa'], 'user': 'username'}
which is the output that i expects

Start with paramiko.config.SSHConfig.parse and reproduce the two SSH configuration examples from the issue. Trace why HostName matching causes User and IdentityFile to be omitted, then verify that parsing a different Host and HostName preserves those variables as shown in the expected output.