a word about thrad safety; linking to first entry in doxygen if there are...

a word about thrad safety; linking to first entry in doxygen if there are multiple; some more link fixes
8 jobs for master in 8 minutes and 19 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build Homepage
passed job_build_homepage #2231

00:00:11

 
  Build Gcc
passed job_make_gcc #2232

00:01:10

 
  Test Gcc
passed job_test_gcc #2233

00:01:50

92.453%
 
  Build Gcc Nocheck
passed job_make_gcc_nocheck #2234

00:01:07

 
  Test Gcc Nocheck
passed job_test_gcc_nocheck #2235

00:00:15

 
  Build Python
passed job_build_python #2236

00:01:35

 
  Build Clang
passed job_make_clang #2237

00:01:55

 
  Test Clang
passed job_test_clang #2238

00:00:12