script: invoke addons as script with exception handler
script: invoke addons as script with exception handler

Fixes #2837

cortesi/mitmproxy,mitmproxy/mitmproxy,vhaupert/mitmproxy,mitmproxy/mitmproxy,mitmproxy/mitmproxy,zlorb/mitmproxy,zlorb/mitmproxy,mhils/mitmproxy,vhaupert/mitmproxy,ujjwal96/mitmproxy,ujjwal96/mitmproxy,vhaupert/mitmproxy,zlorb/mitmproxy,ujjwal96/mitmproxy,mhils/mitmproxy,cortesi/mitmproxy,Kriechi/mitmproxy,ujjwal96/mitmproxy,Kriechi/mitmproxy,cortesi/mitmproxy,vhaupert/mitmproxy,zlorb/mitmproxy,mhils/mitmproxy,Kriechi/mitmproxy,mhils/mitmproxy,mitmproxy/mitmproxy,mitmproxy/mitmproxy,Kriechi/mitmproxy,cortesi/mitmproxy,mhils/mitmproxy