- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update to tcsh 6.18.01.

Remove unused GPL files from tcsh.

This commit was generated by cvs2svn to compensate for changes in r167465,
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This commit was generated by cvs2svn to compensate for changes in r145479,
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This commit was generated by cvs2svn to compensate for changes in r131962,
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This commit was generated by cvs2svn to compensate for changes in r100616,
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This commit was generated by cvs2svn to compensate for changes in r83098,
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This commit was generated by cvs2svn to compensate for changes in r69408,
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This commit was generated by cvs2svn to compensate for changes in r59415,
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This commit was generated by cvs2svn to compensate for changes in r59243,
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