[fix] Perforce auth provider panics when only IP is provided#64533

pjlast wants to merge 3 commits into

mainsourcegraph/sourcegraph-public-snapshot:mainfrom

petrilast-rel-358-bug-nil-pointer-dereference-in-url-parsing-for-perforcesourcegraph/sourcegraph-public-snapshot:petrilast-rel-358-bug-nil-pointer-dereference-in-url-parsing-for-perforceCopy head branch name to clipboard