Update docs about make manpages

doc/release-process.md

@@ -61,7 +61,7 @@ Install deps on Linux:
    - To make a pre-release "beta" you can modify `CLIENT_VERSION_BUILD` but that is rarely done in Hush world.
    - A `CLIENT_VERSION_BUILD` of 50 means "actual non-beta release"
    - Make sure to keep the values in configure.ac and src/clientversion.h the same. The variables are prefixed wth an underscore in configure.ac
- - Run ./util/gen-manpages.sh, commit + push results
+ - Run `make manpages`, commit + push results
    - PROTIP: Man page creation must be done after updating the version number and recompiling and before Debian package creation
  - Update checkpoints in src/chainparams.cpp via util/checkpoints.pl
    - checkpoints.pl will just generate the data you need, it must be manually copied into the correct place

util/README.md

@@ -76,6 +76,8 @@ If there are 'unsupported' symbols, the return value will be 1 a list like this
 A small script to automatically create manpages in ../../doc/man by running the release binaries with the -help option.
 This requires help2man which can be found at: https://www.gnu.org/software/help2man/
 
+When you type "make manpages" it runs this script.
+
 ## gen-linux-binary-release.sh
 
 Generate linux release binary.