### Description
On creating dispatcher with `kamctl` in the case of `db_text` it fails
### Troubleshooting
#### Reproduction
Point `kamctlrc` to DB_TEXT.
Run `kamctl dispatcher add 1 sip:asterisk_2:5060 1 3`
Run 'kamctl dispatcher add 1 sip:asterisk_2:5060 1 3 'prefix=123'
'test1''
Run 'kamctl dispatcher show'
Run 'kamctl dispatcher reload'
#### Debugging Data
```
# kamctl dispatcher add 1 sip:asterisk_2:5060 1 3
attrs cannot be empty or null
-e \E[37;31mERROR: dispatcher - SQL Error
```
```
# kamctl dispatcher add 1 sip:asterisk_2:5060 1 3 'prefix=123' 'test1'
Traceback (most recent call last):
File "/usr/lib/x86_64-linux-gnu/kamailio//kamctl/dbtextdb/dbtextdb.py", line
1243, in <module>
main(sys.argv)
File "/usr/lib/x86_64-linux-gnu/kamailio//kamctl/dbtextdb/dbtextdb.py", line
1230, in main
dataset = conn.Execute(' '.join(argv[1:]))
File "/usr/lib/x86_64-linux-gnu/kamailio//kamctl/dbtextdb/dbtextdb.py", line
423, in Execute
self.WriteTempTable()
File "/usr/lib/x86_64-linux-gnu/kamailio//kamctl/dbtextdb/dbtextdb.py", line
1138, in WriteTempTable
self.temp_file.write(header.strip() + '\n')
File "/usr/lib/python3.7/tempfile.py", line 620, in func_wrapper
return func(*args, **kwargs)
TypeError: a bytes-like object is required, not 'str'
-e \E[37;31mERROR: dispatcher - SQL Error
```
dump is showing active dispatchers, show - is not.
```
# kamctl dispatcher dump
{
"jsonrpc": "2.0",
"result": {
"NRSETS": 1,
"RECORDS": [{
"SET": {
"ID": 1,
"TARGETS": [{
"DEST": {
"URI": "sip:asterisk_2:5060",
"FLAGS": "AP",
"PRIORITY": 0
}
}]
}
}]
},
"id": 124
}
root@e529c8cb4f62:/# kamctl dispatcher show
-e dispatcher gateways
```
No result on reload
```
# kamctl dispatcher reload
{
"jsonrpc": "2.0",
"result": {
},
"id": 160
}
```
### Possible Solutions
I've tried to add data to the table manually, but here I got another issue.
But on Kamailio load, the only first dispatcher is processed. Will add another issue on
this.
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
/# kamailio -v
version: kamailio 5.4.1 (x86_64/linux)
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, 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, TLS_PTHREAD_MUTEX_SHARED
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 8.3.0
```
* **Operating System**:
Debian 10/Docker
```
# uname -a
Linux 9b7efa852274 5.3.18-lp152.36-default #1 SMP Tue Aug 18 17:09:44 UTC 2020 (885251f)
x86_64 GNU/Linux
```
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