### Description
I am trying to configure some "default" settings in Kamailio that would be
independent of the configuration file. The command-line options `--loadmodule`
and `--modparam` seemed to be exactly what I was looking for.
However, I noticed that these options are processed **before** the
configuration file is loaded. As a result, the `--modparam` option cannot be
used separately, because the module for the specified parameter has not yet
been loaded:
```
# kamailio -E -DD --modparam=corex:alias_subdomains:s:kamailio.org
0(653) ERROR: <core> [core/modparam.c:199]: set_mod_param_regex(): No module
matching <corex> found
0(653) ERROR: <core> [main.c:2584]: main(): failed to set modparam:
corex:alias_subdomains:s:kamailio.org
```
To address this, the module needs to be loaded first using the `--loadmodule`
option. However, this causes an error if the same module is also loaded in the
configuration file:
```
# kamailio -E -DD --loadmodule=corex
--modparam=corex:alias_subdomains:s:kamailio.org
0(654) WARNING: <core> [core/sr_module.c:611]: ksr_load_module(): attempting to
load the same module twice (/usr/lib/x86_64-linux-gnu/kamailio/modules/corex.so)
0(654) CRITICAL: <core> [core/cfg.y:4014]: yyerror_at(): parse error in config
file /etc/kamailio/kamailio.cfg, line 283, column 12-21: failed to load module
```
### Possible Solutions
Would it be possible to move the processing of these command-line options
**after** the configuration file is loaded? And could the `--loadmodule` option
ignore loading a module if it has already been loaded via the configuration
file?
Another potential solution could be introducing new options, such as
`--loadmodule-after` and `--modparam-after`, to specify parameters that should
only be applied once the configuration file has been loaded.
What do you think about these suggestions?
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.8.4 (x86_64/linux)
```
* **Operating System**:
```
Linux 010a217cd09a 6.12.10-orbstack-00297-gf8f6e015b993 #42 SMP Sun Jan 19
03:00:07 UTC 2025 x86_64 GNU/Linux
```
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