### Description

the /var/run/kamailio directory for the fifo and crtl files are denied for acces to the service as i can see directory are owed byt root and only ower and group have access

kamailio 4.4 backported by me for Debian jessie have this: `drwxr-xr-x 2 kamailio kamailio 100 Aug 15 17:33 kamailio` kamailio 5.2 installed on buster/testing build from sources: `drwxr-x--- 2 root root 120 Jan 30 09:35 kamailio`

**NOTE** no definiton are setup, and surprise if i defined some, the only working dir are /tmp !!!

### Troubleshooting

kamailio 4.4 backported by me for Debian jessie have this: `drwxr-xr-x 2 kamailio kamailio 100 Aug 15 17:33 kamailio` kamailio 5.2 installed on buster/testing build from sources: `drwxr-x--- 2 root root 120 Jan 30 09:35 kamailio`

due that several issues are happened if we started using some modules due unable to manage the socket control:

``` Jan 31 15:35:51 venenux-debian kamailio[16861]: 17(16889) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(7, 0x7f6ed6f88d88, 0, 5000): Invalid argument [22] Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: ctl [ctl.c:390]: mod_destroy(): ERROR: ctl: could not delete unix socket /var/run/kamailio//kamailio_ctl: Permission denied (13) Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: <core> [db_pool.c:100]: pool_remove(): removing connection from the pool Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:85]: tm_shutdown(): start Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:88]: tm_shutdown(): emptying hash table Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:90]: tm_shutdown(): removing semaphores Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:92]: tm_shutdown(): destroying tmcb lists Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:95]: tm_shutdown(): done Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: jsonrpcs [jsonrpcs_fifo.c:599]: jsonrpc_fifo_destroy(): FIFO stat failed: Permission denied Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: jsonrpcs [jsonrpcs_sock.c:516]: jsonrpc_dgram_destroy(): socket stat failed: Permission denied ```

#### Reproduction

build from sources with default values enable dialog, blf support and asterisk and start service.. when try to control using socket kamailio cannot comunicate with itselft! very ironic!

#### Log Messages

``` Jan 31 15:35:51 venenux-debian kamailio[16861]: 17(16889) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(7, 0x7f6ed6f88d88, 0, 5000): Invalid argument [22] Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: ctl [ctl.c:390]: mod_destroy(): ERROR: ctl: could not delete unix socket /var/run/kamailio//kamailio_ctl: Permission denied (13) Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: <core> [db_pool.c:100]: pool_remove(): removing connection from the pool Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:85]: tm_shutdown(): start Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:88]: tm_shutdown(): emptying hash table Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:90]: tm_shutdown(): removing semaphores Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:92]: tm_shutdown(): destroying tmcb lists Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) DEBUG: tm [t_funcs.c:95]: tm_shutdown(): done Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: jsonrpcs [jsonrpcs_fifo.c:599]: jsonrpc_fifo_destroy(): FIFO stat failed: Permission denied Jan 31 15:35:51 venenux-debian kamailio[16861]: 0(16863) ERROR: jsonrpcs [jsonrpcs_sock.c:516]: jsonrpc_dgram_destroy(): socket stat failed: Permission denied ```

#### SIP Traffic

NOT RELATED ### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.2.1 (x86_64/linux) flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144 MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 4.9.2

```

* **Operating System**:

``` Debian buster/testing ```