kamailio: bump to 5.6.2

- 4 new modules: misctest, posops, siprepo & slack
- 140-redis_use_pkg-config.patch refreshed
- 160-ldap-rename-private-function-ldap_connect.patch and
  170-core-add-support-for-time64-libcs.patch removed (applied
  upstream)
- 160-siputils-fix-time_t-warning-and-a-typo.patch added to fix time_t
  warning (sent upstream, see [1])

[1] https://github.com/kamailio/kamailio/pull/3266

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

net/kamailio/patches/140-redis_use_pkg-config.patch

@@ -15,7 +15,7 @@
  	HIREDISDEFS=-I$(LOCALBASE)/include
 --- a/src/modules/db_redis/Makefile
 +++ b/src/modules/db_redis/Makefile
-@@ -5,12 +5,10 @@ include ../../Makefile.defs
+@@ -5,7 +5,6 @@ include ../../Makefile.defs
  auto_gen=
  NAME=db_redis.so
  
@@ -23,11 +23,15 @@
  HIREDIS_BUILDER = $(shell \
  	if pkg-config --exists hiredis; then \
  		echo 'pkg-config hiredis'; \
+@@ -16,8 +15,6 @@ HIREDIS_CLUSTER_BUILDER = $(shell \
+ 		echo 'pkg-config hiredis_cluster'; \
  	fi)
--endif
  
+-endif
+-
  ifeq ($(HIREDIS_BUILDER),)
  	HIREDISDEFS=-I$(LOCALBASE)/include -I$(LOCALBASE)/include/hiredis -I/usr/include/hiredis
+ 	HIREDISLIBS=-L$(LOCALBASE)/lib -lhiredis
 --- a/src/modules/ndb_redis/Makefile
 +++ b/src/modules/ndb_redis/Makefile
 @@ -5,12 +5,10 @@ include ../../Makefile.defs