Check the length of the node name to prevent an overflow.

* pan/epmd-vulnerabilities/OTP-8780:
  Teach testcases to survive TIME_WAIT overload
  Update erl_interface doc and testsuite for epmd changes
  Restore null termination of input buffer
  Teach testcase epmd_SUITE:too_large to accept econnaborted
  Teach epmd_cli.c to not respond 'Killed' when killing denied
  Calculate minimal packet size for ALIVE2 requests correctly
  Document epmd and it's options properly and fixup help text
  Fix anomalies in epmd not yet reported as security issues
  Remove two buffer overflow vulnerabilities in EPMD
  Remove all support for ancient EPMD protocol
  Remove very old protocol from EPMD

Conflicts:
	lib/erl_interface/src/epmd/epmd_port.c

Check the length of the buffer before copying.

ei_cnode ec;
struct in_addr addr;
char *node = (char *)calloc(5001, 1);
(void)memset(node, 'x', 5000);

ei_connect_init(&ec, node, "", 0);

addr.s_addr = inet_addr("192.168.1.1");
ei_xconnect(&ec, &addr, node);