Snort++ Update

Pushed build 219 to github (snortadmin/snort3):

• add dce auto detect to wizard
• add MIME file processing to new http_inspect
• add chapters on perf_monitor and file processing to user manual
• appid refactoring and cleanup
• many appid fixes for leaks, sanitizer, and analyzer issues
• fix appid pattern matching for http
• fix various race conditions reported by thread sanitizer
• fix out-of-order FIN handling
• fix cmake package name used in HS and HWLOC so that REQUIRED works
• fix out-of-tree doc builds
• fix image sizes to fit page
  thanks to wyatuestc for reporting the issue
• fix fast pattern selection when multiple designated
  thanks to j.mcdowell@titanicsystems.com for reporting the issue
• change -L to -K in README and manual
  thanks to jncornett for reporting the issue
• support compiling catch tests in standalone source files
• create pid file after dropping privileges
• improve detection and use of CppUTest in non-standard locations