Let -Dlibexecdir take preference

Adjust protocoldir accordingly when it is passed.

Author: bl33pbl0p

meson.build

@@ -95,9 +95,10 @@ endif
 
 prefixdir = get_option('prefix')
 bindir = join_paths(prefixdir, get_option('bindir'))
+libdir = join_paths(prefixdir, get_option('libdir'))
 datadir = join_paths(prefixdir, get_option('datadir'))
 docdir = join_paths(datadir, 'doc/casync')
-protocoldir = join_paths(prefixdir, 'lib/casync/protocols')
+protocoldir = join_paths(libdir, 'casync/protocols')
 conf.set_quoted('CASYNC_PROTOCOL_PATH', protocoldir)
 
 liblzma = dependency('liblzma',