* feat(process): allow commands and envs on proces_start
* refactor(process): copy process arguments once whenever possible
Refactors the code to use an arglist type which is just lpCmdline on Windows
and a list in Linux.
The function automatically escapes the command when it is needed, avoiding
a second copy.
This also allows UTF-8 commands btw.
* fix(process): fix invalid dereference
* refactor(process): mark xstrdup as potentially unused
* feat(process): add parent process environment when launching process
* fix(process): fix operator precedence with array operators
* fix(process): fix segfault when freeing random memory
* fix(process): fix wrong check for setenv()
* fix(process): fix accidentally initializing an array by assignment
* fix(process): clear return value if success
Takase
311651333a