Export nftnl_set_elem_nlmsg_build symbol in the right version

libnftnl.map: Restore custom LIBNFTNL_RHEL_14 version (Phil Sutter) [2211096]

Rebase onto version 1.2.2 (Phil Sutter) [2211096]

set: expose nftnl_set_elem_nlmsg_build() (Phil Sutter) [2040754]
expr: dynset: release stateful expression from .free path (Phil Sutter) [2040478]
set_elem: missing set and build for NFTNL_SET_ELEM_EXPR (Phil Sutter) [2040478]

src: Fix for reading garbage in nftnl_chain getters (Phil Sutter) [1758673]

set_elem: Introduce support for NFTNL_SET_ELEM_KEY_END (Phil Sutter) [1795223]
set: Add support for NFTA_SET_DESC_CONCAT attributes (Phil Sutter) [1795223]
include: resync nf_tables.h cache copy (Phil Sutter) [1795223]

chain: Correctly check realloc() call (Phil Sutter) [1778952]
flowtable: Correctly check realloc() call (Phil Sutter) [1778952]
chain: Fix memleak in error path of nftnl_chain_parse_devs() (Phil Sutter) [1778952]
flowtable: Fix memleak in error path of nftnl_flowtable_parse_devs() (Phil Sutter) [1778952]

Rebase onto upstream version 1.1.5 (Phil Sutter) [1717129]

set: Export nftnl_set_list_lookup_byname() (Phil Sutter) [1762563]

obj/ct_timeout: Fix NFTA_CT_TIMEOUT_DATA parser (Phil Sutter) [1758673]
set_elem: Validate nftnl_set_elem_set() parameters (Phil Sutter) [1758673]
obj/ct_timeout: Avoid array overrun in timeout_parse_attr_data() (Phil Sutter) [1758673]
set: Don't bypass checks in nftnl_set_set_u{32,64}() (Phil Sutter) [1758673]
obj/tunnel: Fix for undefined behaviour (Phil Sutter) [1758673]
set_elem: Fix return code of nftnl_set_elem_set() (Phil Sutter) [1758673]
obj: ct_timeout: Check return code of mnl_attr_parse_nested() (Phil Sutter) [1758673]

Rebase to upstream version 1.1.4 (Phil Sutter) [1717129]

src: rule: Support NFTA_RULE_POSITION_ID attribute (Phil Sutter) [1670565]

src: chain: Fix nftnl_chain_rule_insert_at() (Phil Sutter) [1666495]
src: chain: Add missing nftnl_chain_rule_del() (Phil Sutter) [1666495]
flowtable: Fix for reading garbage (Phil Sutter) [1661327]
flowtable: Fix memleak in nftnl_flowtable_parse_devs() (Phil Sutter) [1661327]
flowtable: Fix use after free in two spots (Phil Sutter) [1661327]
flowtable: Add missing break (Phil Sutter) [1661327]
object: Avoid obj_ops array overrun (Phil Sutter) [1661327]

chain: Hash chain list by name (Phil Sutter) [1658533]
chain: Add lookup functions for chain list and rules in chain (Phil Sutter) [1658533]
chain: Support per chain rules list (Phil Sutter) [1658533]
src: remove nftnl_rule_cmp() and nftnl_expr_cmp() (Phil Sutter) [1658533]

Rebase onto upstream version 1.1.1
Sync spec file with RHEL7
Disable JSON parsing, deprecated by upstream
Make use of builtin testsuite

Drop leftover mxml dependency [1594917]