Merge branch 'jk/system-path-cleanup' into maint

Code clean-up. * jk/system-path-cleanup: git_extract_argv0_path: do nothing without RUNTIME_PREFIX system_path: move RUNTIME_PREFIX to a sub-function

Junio C Hamano committed Oct 18, 2017 at 14:19 UTC 110a642801e55dcf6e9ffe415dfee3499d2c3c6f

No changes.