* Fix missing LF
* Return when item is NULL
* Explicitly state error condition
* strlist_contains: Allow index result argument to be NULL
* BUGFIX: strlist_contains now uses strstr instead of strcmp
* The match was never intended to be exact
* BUGFIX: log_msgv now prints a LF to the same stream as the message
* BUGFIX: env_manipulate_pathstr PM_ONCE logic did opposite of what was intended
* When strstr finds the path in the system path, it's supposed to free the new system path and exit. In this case it was freeing the path when the path wasn't found that lead to several instances of PATH not being updated correctly
* Free result when shell_output fails
* join: Fix segfault on memory error
* join_ex: Fix leak on memory error
* Initialize installer_url and python_override_version to zero
* Remove redundant calls to memset