Temporarily switch to boost::regex

In combination with musl, parser crashed. glibc fine. Could not pinpoint
down the exact reason mainly due to time constraints. Strange, in both
cases actually libstdc++ is used, so this is very odd.

parser.h

@@ -1,12 +1,12 @@
 #ifndef PARSER_H
 #define PARSER_H
-#include <regex>
+#include <boost/regex.hpp>
 #include "iparser.h"
 
 class Parser : public IParser
 {
   private:
-	std::string processLink(const PageDao &pageDao, UrlProvider &urlProvider, std::smatch &match) const;
+	std::string processLink(const PageDao &pageDao, UrlProvider &urlProvider, boost::smatch &match) const;
 
   public:
 	std::string extractCommand(std::string cmdname, std::string content) const;