Meta server: fix typos in checkpoint related variable and parameter names.
Qfs client lib: use buffer of at least max of sysconf(_SC_GETPW_R_SIZE_MAX), sysconf(_SC_GETGR_R_SIZE_MAX) size with getpwnam_r(), getpwuid_r(), getgrgid_r() getgrnam_r().
Qfs tool: rename "qfstool" into "qfs".
Qfs tool: handle strftime() possible errors by setting the time buffer to "-".
Qfs client: add missing effective group setting to SetEUserAndEGroupSelf().
QC_OS_NAME_FREEBSD uses XSI strerror_r. fixes #14

  Build using the XSI-compliant strerror_r for FreeBSD in addition to
  OSX and Solaris.  Add _POSIX_C_SOURCE check to GNU test macros.
use bourne-compliant shell in scripts