Adapt to dev-libs/iniparser being slotted in Gentoo.
--- a/meson.build
+++ b/meson.build
@@ -179,12 +179,12 @@ iniparser_headers = ['iniparser.h', 'dictionary.h']
 message('Looking for iniparser include headers', iniparser_headers)
 
 iniparserdir = include_directories(includedir / get_option('iniparserdir'), is_system:true)
-iniparser = cc.find_library('iniparser', required : (get_option('iniparserdir') != '') ,
+iniparser = cc.find_library('iniparser4', required : (get_option('iniparserdir') != '') ,
 	  has_headers :iniparser_headers ,header_include_directories : iniparserdir)
 
 if not iniparser.found()
-   iniparserdir = include_directories(includedir / 'iniparser', is_system:true)
-   iniparser = cc.find_library('iniparser', required : true, has_headers : iniparser_headers,
+   iniparserdir = include_directories(includedir / 'iniparser4', is_system:true)
+   iniparser = cc.find_library('iniparser4', required : true, has_headers : iniparser_headers,
 	     header_include_directories : iniparserdir)
 endif
 iniparser = declare_dependency(include_directories: iniparserdir, dependencies:iniparser)