batctl: update to version 2026.3

batctl: update to version 2026.3

From upstream changelog
https://git.open-mesh.org/batctl.git/tree/CHANGELOG.rst:

* coding style cleanups and refactoring
* bugs squashed:
  - bat-hosts: compare full path for deduplication
  - bat-hosts: free bat_host when hash_add fails
  - dat_cache: fix multicast/unicast filter for MAC address
  - debug: avoid endless getopt loop for attached '-w' argument
  - debug: reject non-finite/negative interval/timeout values
  - debug: reject trailing garbage for intervals
  - debug: use strict interval/timeout parsing
  - event: don't print timestamp prefix for skipped events
  - fix parsing of parameters with arguments
  - genl_json: avoid negative chars in sanitize_string
  - genl_json: escape non-printable characters as valid JSON
  - genl_json: reject unknown options in handle_json_query
  - handle netlink callback object on error
  - icmp_helper: attach socket filter before packets can arrive
  - icmp_helper: fail send when the primary mac is unknown
  - icmp_helper: return only initialized icmp destination unreached bytes
  - icmp_helper: return proper errno on syscall failures
  - improve number parsing error handling
  - interface: report rtnl query failures
  - interface: return fail for non-existing interface
  - isolation_mark: fix error message for invalid mark/mask values
  - netlink: abort netlink_print_common when message allocation fails
  - netlink: always 0-terminate hardif name
  - netlink: check for BATADV_ATTR_MESH_ADDRESS before accessing it
  - netlink: detect receive errors in netlink_print_common
  - netlink: detect receive errors in netlink_simple_request
  - netlink: detect receive errors in query_rtnl_link
  - netlink: detect receive errors in query_rtnl_link_single
  - netlink: don't format NULL extra_info in info_callback
  - netlink: free header lines after error
  - netlink: report dump errors signalled in the NLMSG_DONE message
  - netlink: report error on query_rtnl_link send failure
  - netlink: report kernel errors when writing settings
  - netlink: report send errors in netlink_simple_request
  - originators: fix throughput lines with bat_hosts
  - ping/traceroute: don't restart RTT timer on stray replies
  - ping: count sent and not received pings
  - ping: fix rtt minimum tracking when a sample is 0.0
  - ping: keep huge '-i' intervals from turning into a flood ping
  - ping: reject invalid packet count argument
  - ping: reject invalid timeout argument
  - tcpdump: check frame length before reading the ethernet header
  - tcpdump: correct output of VLAN IDs
  - tcpdump: don't label unknown ICMPv6 types as unreachable
  - tcpdump: fix "subtybe" typo in 4ADDR output
  - tcpdump: fix coded packet mac dest mac addresses
  - tcpdump: fix endianness of fragmentation sequence number
  - tcpdump: fix reported length for ICMP6_TIME_EXCEEDED
  - tcpdump: fix source address selection for 802.11 data frames
  - tcpdump: handle TCP packet with bogus data offset
  - tcpdump: print the unreachable host for ICMP port unreachable
  - tcpdump: reject invalid packet type arguments
  - tcpdump: resolve bat-host name for ROAMv1 client
  - tcpdump: return EXIT_SUCCESS on normal termination
  - tcpdump: skip partial line for oversized ICMPv6 errors
  - tpmeter: abort result wait on receive errors
  - tpmeter: don't cancel test from the signal handler
  - tpmeter: fix Gbps output
  - tpmeter: label sub-kByte/s rate in bits per second
  - tpmeter: reject invalid test duration argument
  - traceroute: handle fast replies
  - traceroute: probe the advertised maximum number of hops
  - traceroute: return EXIT_NOSUCCESS when destination not reached
  - translate: don't overwrite the search key
  - version: avoid use of uninitialized read buffer

Signed-off-by: Sven Eckelmann <redacted>