Don't force-build the man-pages, use option instead (#111)

* Only build man-pages and require scdoc if 'man-page' option is true

Co-authored-by: Jonas Frei <8ec426b4-7173-428a-a6dc-3c520b45b0e2@wwsxrfc8.anonaddy.com>

meson.build

@@ -89,8 +89,8 @@ if get_option('fish-completions')
 endif
 
 # Man pages
-man_pages = get_option('man-pages')
-scdoc = dependency('scdoc', version: '>=1.9.2', native: true, required: man_pages)
+if get_option('man-pages')
+  scdoc = dependency('scdoc', version: '>=1.9.2', native: true, required: true)
   if scdoc.found()
     scdoc_prog = find_program(scdoc.get_pkgconfig_variable('scdoc'), native: true)
 
@@ -119,3 +119,4 @@ if scdoc.found()
       )
     endforeach
   endif
+endif