Minor fixes, NETCONF subscription example, and more!

What's Changed

• Support supplying private key with system transport by @netixx in #104
• fix: fixes nc1.0 not stripping delim, update junos golden test output… by @carlmontanari in #102
• Fix transport close() to also close the underlying client by @mayuresh82 in #108
• Fix goroutine leak in channel.read when transport is closed by @mayuresh82 in #109
• Add tacacs+ configure prompt in cisco assets platform. by @dmmjy9 in #111
• updates to NETCONF error checking & adding subscription example by @0x2142 in #110

New Contributors

• @netixx made their first contribution in #104
• @mayuresh82 made their first contribution in #108
• @dmmjy9 made their first contribution in #111
• @0x2142 made their first contribution in #110

Full Changelog: v1.1.3...v1.1.4