Redefined subs from OTOBO::RPC

[bschmalhofer]

These warnings show up in the Apache error log when the scripts bin bin/cgi-bin are used:

[Sat Jul 10 21:18:13 2021] otobo.psgi: Subroutine Dispatch redefined at /opt/otobo/bin/cgi-bin/../psgi-bin/otobo.psgi line 95.
[Sat Jul 10 21:18:13 2021] otobo.psgi: Subroutine DispatchMultipleTicketMethods redefined at /opt/otobo/bin/cgi-bin/../psgi-bin/otobo.psgi line 173.
[Sat Jul 10 21:20:15 2021] otobo.psgi: Subroutine new redefined at /opt/otobo/bin/cgi-bin/../psgi-bin/otobo.psgi line 87.

These warnings come from the OTOBO::RPC package in otobo.psgi.

Originally posted by @bschmalhofer in #1054 (comment)

[bschmalhofer]

Tried to eliminate the package keyword by doing something like *OTOBO::RPC::new = sub {...};. Didn`t help.
...

[bschmalhofer]

Moving the implementation of OTOBO::RPC into the file Kernel/System/Web/RPC.pm . This alleviates the redefined sub warnings.
Tested both with Plack::Handler::Apache2 and with Modperl::Registry. Surprisingly, in both cases the file otobo.psgi is reloaded for every request. For the Plack::Handler::Apache2 case this can be improved by preloading otobo.psgi . See https://metacpan.org/pod/Plack::Handler::Apache2#STARTUP-FILE.
Closing this issue, but opening an issue for the preloading.