Made 'sys' fork and use 'exec' to execute commands
Made 'sys' fork and use 'exec' to execute commands

Made 'sys' use fork and 'exec' to execute shell commands. This
simplifies the code and allows greater flexibility.

Signed-off-by: Lawrence John Maynard <99c9491dbc214083d560f356b771e6dd533c3bfe@gmx.com>

elsiklab/sequenceserver,yeban/sequenceserver,elsiklab/sequenceserver,yeban/sequenceserver,elsiklab/sequenceserver,yeban/sequenceserver,yeban/sequenceserver