Commits for braney

v254_base to v255_preview (2011-07-19 to 2011-07-26) v255

• fix segvio; if udcDir can't be opened. Add Hub clear from command line.
  • src/hg/lib/trackHub.c - lines changed 3, context: html, text, full: html, text
  • src/hg/utils/hubCheck/hubCheck.c - lines changed 56, context: html, text, full: html, text
• changes out of code review #4647
  • src/hg/hgHubConnect/hgHubConnect.c - lines changed 3, context: html, text, full: html, text
  • src/hg/inc/hubConnect.h - lines changed 4, context: html, text, full: html, text
  • src/hg/lib/hubConnect.c - lines changed 23, context: html, text, full: html, text
• fix a bug that Greg found. #4627
  • src/hg/hgHubConnect/hgHubConnect.c - lines changed 3, context: html, text, full: html, text
• v255 preview1
  • src/utils/qa/weeklybld/buildEnv.csh - lines changed 2, context: html, text, full: html, text