variables. Found by coverity, cppcheck
[src/Mayaqua/Unix.c:2559]: (style) Unused variable: status
[src/Mayaqua/Unix.c:181]: (style) Redundant condition: select!=NULL. 'select==NULL || (select!=NULL && (*select)(entry))' is equivalent to 'select==NULL || (*select)(entry)'
[src/Mayaqua/Unix.c:1297]: (style) The function 'UnixDaemon' is never used.
[src/Mayaqua/Unix.c:543]: (style) The function 'UnixGetDiskFreeW' is never used.
[src/Mayaqua/Unix.c:834]: (style) The function 'UnixRestoreThreadPriority' is never used.
[src/Mayaqua/Unix.c:816]: (style) The function 'UnixSetThreadPriorityHigh' is never used.
[src/Mayaqua/Unix.c:825]: (style) The function 'UnixSetThreadPriorityIdle' is never used.
[src/Mayaqua/Unix.c:807]: (style) The function 'UnixSetThreadPriorityLow' is never used.
[src/Mayaqua/Unix.c:2805]: (style) The function 'UnixWaitProcess' is never used.
state of global mutex which may be in intermidiate taken status by one of
threads of the parent, then in child process it tries to get this mutex
and is always pending. One example of mutex is malloc_lock, and there are more.
