Finished merge of rt35143 (pass CFLAGS & co down)

diff --cc RELNOTES
index 0b17a3199438ee7ab78688ac8e5ab582a4536aca,9c9871d8f1d8852a5e62c19a0b3030fd4d02ef04..c2cb98d62cc4c178c58a7394fc69fc9bd0c67d01
--- 1/RELNOTES
--- 2/RELNOTES
+++ b/RELNOTES
@@@ -66,11 -66,11 +66,16 @@@ by Eric Young (eay@cryptsoft.com)
    for code clarity.
    [ISC-Bugs #42834]
  
 +- Corrected a bug which could cause the server to sporadically crash while
 +  loading lease files with the lease-id-format is set to "hex".  Our thanks
 +  to Jay Ford, University of Iowa for reporting the issue.
 +  [ISC-Bugs #43185]
 +
+ - Pass configure arguments which begin with an upper case letter, e.g.
+   CFLAGS, to the embedded bind configure, so it is no longer required
+   to use environment variables to get the same effect.
+   [ISC-Bugs #35143]
+ 
                        Changes since 4.3.0 (bug fixes)
  
  - Tidy up several small tickets.