Merge branch 'work/pt/for-junio' of git://repo.or.cz/git/mingw/4msysgit

* 'work/pt/for-junio' of git://repo.or.cz/git/mingw/4msysgit: Add MinGW-specific execv() override. Fix Windows-specific macro redefinition warning. Fix 'clone' failure at DOS root directory. mingw: do not crash on open(NULL, ...) git-am: fix detection of absolute paths for windows Side-step MSYS-specific path "corruption" leading to t5560 failure. Side-step sed line-ending "corruption" leading to t6038 failure. Skip 'git archive --remote' test on msysGit Do not strip CR when grepping HTTP headers. Skip t1300.70 and 71 on msysGit. merge-octopus: Work around environment issue on Windows MinGW: Report errors when failing to launch the html browser. MinGW: fix stat() and lstat() implementations for handling symlinks MinGW: Add missing file mode bit defines MinGW: Use pid_t more consequently, introduce uid_t for greater compatibility