mailmap: Add mailmap entry for Allen Rabinovich.
mailmap: Add mailmap entry for Allen Rabinovich.

eeshangarg/zulip,punchagan/zulip,rht/zulip,zulip/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,brainwane/zulip,andersk/zulip,showell/zulip,eeshangarg/zulip,brainwane/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,showell/zulip,zulip/zulip,rht/zulip,hackerkid/zulip,punchagan/zulip,rht/zulip,hackerkid/zulip,showell/zulip,punchagan/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,brainwane/zulip,zulip/zulip,kou/zulip,kou/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,kou/zulip,showell/zulip,andersk/zulip,eeshangarg/zulip,brainwane/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,eeshangarg/zulip,kou/zulip,andersk/zulip,showell/zulip,showell/zulip,rht/zulip,zulip/zulip,brainwane/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,showell/zulip