docs/botserver: Add basic troubleshooting help.
docs/botserver: Add basic troubleshooting help.

It could be a non trivial task ensuring that the Zulip server can
access the Botserver. These steps examine some of those cases.

showell/zulip,zulip/zulip,zulip/zulip,kou/zulip,synicalsyntax/zulip,timabbott/zulip,synicalsyntax/zulip,rht/zulip,punchagan/zulip,punchagan/zulip,timabbott/zulip,shubhamdhama/zulip,brainwane/zulip,eeshangarg/zulip,andersk/zulip,kou/zulip,showell/zulip,punchagan/zulip,brainwane/zulip,shubhamdhama/zulip,kou/zulip,brainwane/zulip,zulip/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,hackerkid/zulip,shubhamdhama/zulip,brainwane/zulip,timabbott/zulip,andersk/zulip,zulip/zulip,synicalsyntax/zulip,showell/zulip,timabbott/zulip,rht/zulip,eeshangarg/zulip,timabbott/zulip,brainwane/zulip,shubhamdhama/zulip,andersk/zulip,punchagan/zulip,kou/zulip,rht/zulip,kou/zulip,rht/zulip,synicalsyntax/zulip,timabbott/zulip,shubhamdhama/zulip,hackerkid/zulip,zulip/zulip,brainwane/zulip,eeshangarg/zulip,shubhamdhama/zulip,shubhamdhama/zulip,showell/zulip,hackerkid/zulip,zulip/zulip,synicalsyntax/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,eeshangarg/zulip,showell/zulip,eeshangarg/zulip,brainwane/zulip,andersk/zulip,eeshangarg/zulip,hackerkid/zulip,rht/zulip,timabbott/zulip,synicalsyntax/zulip,synicalsyntax/zulip,punchagan/zulip,kou/zulip,rht/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,showell/zulip,andersk/zulip,hackerkid/zulip