Avoid leaks after errors in freebsd config handler

Freeing allocated memory in an error flow. Currently this would
most likely not occure but a safeguard for future changes.

Renaming vip6_cfg_hander() to vip6_cfg_handler()

Corrected the output of an error log as well.

Correcting check of config value for vip_addr6

Updated for code consistency, but checking the IPv4 vip_addr
pointer might have given problems for IPv6 only configs.

Add support to set interface name of each port in `config.ini`.

Add support for multiple `pci_whitelist` in `config.ini`.

Update LICENCE.

Support set multi virtual IPv4/IPv6 net addrs in `config.ini`, instead of use `ff_ifconfig`.

Close #421.

modify pcap config.

Add IPv6 net addr parameters in config

Co-authored-by: fengbojiang <[email protected]>

解析file_prefix&pci-whitelist配置

解析file_prefix&pci-whitelist配置

Add configuration options `symmetric_rss` to set whether to use symmetric RSS.

#add knictl support

update indent size

update config.c

use 4 space other than tab.

dump packets by core, instead of by ports;without fopen/fclose while dumping

Merge patch of Configuration param to skip "TX checksum offload", refer #448.

Fixed #426, F-stack compile error in Red Hat 8.0 with gcc 8.2.1.

Fix crash of `netstat -n`, refer #438.

lib/ff_config.c

Bonding: supported. but it can't work in multi-processes, to be fix.

fix bug: Can not support more than 32 processes

support more than 32 processes; support 52bytes rsskey; compile failed.

Add pkt_tx_delay parameter in config.ini.
It should be default while handling large concurrent requests, otherwise
it will reduce the throughput.
But if there are only a little, you can set it to les

Add pkt_tx_delay parameter in config.ini.
It should be default while handling large concurrent requests, otherwise
it will reduce the throughput.
But if there are only a little, you can set it to less than 100, even to
0, to reduce the delay of the connection.

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modify according to MR.Wang