New comment by eoli3n on void-packages repository

https://github.com/void-linux/void-packages/issues/30781#issuecomment-837297270

Comment:
sqlite db exists in ``/var/lib/x2go/x2go_sessions``
some references:
- https://lists.x2go.org/pipermail/x2go-user/2019-March/005522.html : no answer
- https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1482 : no answer
--------
to print real error, edit ``/usr/lib/x2go/x2gocheckport`` at line 131
```
  # Filter out any empty or invalid values.
  typeset -i item_i='0'
  typeset item=''

  # add echo of the var between delimiters
  echo "##### ${used_display_ports_work[@]} #####"
  for item in "${used_display_ports_work[@]}"; do
       item_i="${item}"
```
real error is
```
Can't locate Switch.pm in @INC (you may need to install the Switch module) (@INC contains: /usr/lib/perl5/site_perl /usr/share/perl5/site_perl /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5/core_perl /usr/share/perl5/core_perl) at /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper.pl line 23. BEGIN failed--compilation aborted at /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper.pl line 23.
```
```
cpan install Switch
```
solved it, but it is not packaged in the repo

--------
now i get
```
DBI connect('dbname=/var/lib/x2go/x2go_sessions','',...) failed: unable to open database file at /usr/share/perl5/vendor_perl/X2Go/Server/DB/SQLite3.pm line 66.
```
following https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1063
```
➜ x2golistsessions
DBIconnect('dbname=/var/lib/x2go/x2go_sessions','',...)failed:unabletoopendatabasefileat/usr/share/perl5/vendor_perl/X2Go/Server/DB/SQLite3.pmline66.
```

Fix with
```
chmod g+s /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper
chown root:x2gouser /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper
```
--------
Now i get
```
Échec de la connexion /usr/bin/x2gostartagent: ligne 235: ##### ##### 50 : erreur de syntaxe : opérande attendu (le symbole erroné est « ##### ##### 50 ») Unable to find free display port or insert new session into database; parameters: port (50), hostname (voidlinux) and session name (). 
```