Add script for managing standby mode
Add script for managing standby mode

This puts the current gitorious instance into the master or slave mode.
Used when mirroring of the git repositories is configured.

tigefa4u/gitorious-mainline,SamuelMoraesF/Gitorious,gitorious/mainline,SamuelMoraesF/Gitorious,elcom/gitorious,Gitorious-backup/mainline,gitorious/mainline,tigefa4u/gitorious-mainline,Gitorious-backup/mainline,rae/gitorious-mainline,elcom/gitorious,spencerwp/mainline,spencerwp/mainline,tigefa4u/gitorious-mainline,Gitorious-backup/mainline,Gitorious-backup/mainline,gitorious/mainline,rae/gitorious-mainline,spencerwp/mainline,rae/gitorious-mainline,spencerwp/mainline,tigefa4u/gitorious-mainline,elcom/gitorious,gitorious/mainline,SamuelMoraesF/Gitorious,elcom/gitorious,SamuelMoraesF/Gitorious,rae/gitorious-mainline