update net-mgmt/ccnet-client to 6.0.2

Changes: https://github.com/haiwen/ccnet/commits/v6.0.2

• Updated to 6.0.2
• Removed Shebangfix
• Regenerated patchfiles
  • Cleanup copyright statements.
  • Remove server code.
  • [lib] Remove openssl dependency in libccnet.
  • Rename LICENCE.txt to LICENSE.txt.
  • Add back python library

PR: 216347
Submitted by: ultima1252@gmail.com (maintainer)
Reviewed by: matthew
Approved by: matthew (mentor)
Differential Revision: https://reviews.freebsd.org/D9285