Fix javadoc warnings for unknown tags

@sine -> @since

@lnk -> @link

@author: -> @author

Make embedded @ sign literal in one case where it is literal
Remove trailing extra curly brace from javadoc @see reference
Use javadoc @see external URL syntax for these external URLs
Remove empty @see javadoc comment in UpdateCenter
Terminate javadoc @link tags with curly brace instead of right paren
Fix javadoc warnings in method parameters
Remove empty @return javadoc tags - add no value
Fix malformed @see javadoc reference
Merge pull request #860 from MarkEWaite/javadoc-fixes-1

Javadoc fixes for Jenkins core
Close link javadoc tag with curly brace
Remove @author javadoc tag from method, not honored by javadoc

Can use source code history to locate original author.
Merge pull request #863 from MarkEWaite/javadoc-fixes-4

Fix malformed @see javadoc reference
Merge pull request #861 from MarkEWaite/javadoc-fixes-2

Fix javadoc warnings in method parameters
Merge pull request #862 from MarkEWaite/javadoc-fixes-3

Remove empty @return javadoc tags - add no value
Merge pull request #864 from MarkEWaite/javadoc-fixes-5

Fix javadoc tag which was not closed, remove ignored @author tag
Fix many of the javadoc unresolved @link warnings
Fix several @link javadoc warnings
Remove javadoc reference to now private buildReactorListener
Fix ComputerListener.onTemporarilyOffline javadoc to match implementation

Earlier javadoc for onTemporarilyOffline copied onTemporarilyOnline.
Merge pull request #868 from MarkEWaite/javadoc-fixes-6

Fix many of the javadoc unresolved @link warnings