Fix typos in manpage
Fix typos in manpage

As reported by lintian while doing Debian packaging work:

| I: salt-common: spelling-error-in-manpage usr/share/man/man7/salt.7.gz Alot A lot
| I: salt-common: spelling-error-in-manpage usr/share/man/man7/salt.7.gz dependancy dependency
| I: salt-common: spelling-error-in-manpage usr/share/man/man7/salt.7.gz dependant dependent
| I: salt-common: spelling-error-in-manpage usr/share/man/man7/salt.7.gz specifed specified

plus one minor one I stumbled upon (sucsessfully -> successfully).

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt