Fixes for script auto-documentation.

- Fixing the parts of the `make restdoc` and `make doc` process that were
  broken by the last Bro script re-organization

- Generated documentation for Bro scripts derived from BiFs now use the
  original BiF source file as the "original source file" link

- Renaming of the internal POLICYDEST definition and other misc places that
  refer to "policy" scripts; that terminology doesn't make total sense now

- Added a documentation blacklist reminder test that will fail if there's
  scripts that are blacklisted from being documentated because they're still
  in progress

- Some minor Bro script changes to fix small @load dependency errors

Addresses #543

scripts/CMakeLists.txt

@@ -1,9 +1,8 @@
 include(InstallPackageConfigFile)
 
-install(DIRECTORY ./ DESTINATION ${POLICYDIR} FILES_MATCHING
+install(DIRECTORY ./ DESTINATION ${BRO_SCRIPT_INSTALL_PATH} FILES_MATCHING
         PATTERN "all.bro" EXCLUDE
         PATTERN "site/local.bro" EXCLUDE
-        PATTERN "bro.init"
         PATTERN "*.bro"
         PATTERN "*.sig"
         PATTERN "*.osf"
@@ -13,6 +12,6 @@ install(DIRECTORY ./ DESTINATION ${POLICYDIR} FILES_MATCHING
 # user modify-able.
 InstallPackageConfigFile(
     ${CMAKE_CURRENT_SOURCE_DIR}/site/local.bro
-    ${POLICYDIR}/site
+    ${BRO_SCRIPT_INSTALL_PATH}/site
     local.bro)