Add a project-customizable hook to result pages

[Rytiss]

Description of the Change
Workunit pages already have a hook to display project-specific data for a workunit, but result pages lack such functionality. This change adds a similar hook to the result pages.

Release Notes
Add a hook to easily specify project-specific information in the result pages.

[codecov]

Codecov Report

Merging #4026 into master will increase coverage by 14.71%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master    #4026       +/-   ##
=============================================
+ Coverage      8.74%   23.45%   +14.71%     
- Complexity        0      752      +752     
=============================================
  Files            36       98       +62     
  Lines          6062     7069     +1007     
  Branches          0     1492     +1492     
=============================================
+ Hits            530     1658     +1128     
+ Misses         5532     5295      -237     
- Partials          0      116      +116     

Impacted Files	Coverage Δ	Complexity Δ
lib/parse.h
lib/opencl_boinc.cpp
lib/wslinfo.cpp
lib/util.h
db/boinc_db.h
sched/sched_shmem.cpp
lib/miofile.cpp
lib/average.h
sched/credit.h
lib/coproc.cpp
... and 124 more

[davidpanderson]

Thanks. I updated the doc.