Fix threads safety (#4)

* Update HttpseRequest.c

* Update HttpseRuleset.h

Author: cschanaj

src/HttpseRequest.c

@@ -39,6 +39,9 @@ HttpseRequest_init(const char *url, const HttpseRequestOptions *options)
 	HTTPSE_CURL_SETOPT(rq->curl, WRITEFUNCTION, HttpseVector_append);
 	HTTPSE_CURL_SETOPT(rq->curl, HEADERDATA, rq->hd);
 	HTTPSE_CURL_SETOPT(rq->curl, HEADERFUNCTION, HttpseVector_append);
+	
+	/* Remark: See https://curl.haxx.se/libcurl/c/multithread.html */
+	HTTPSE_CURL_SETOPT(rq->curl, NOSIGNAL, 1L);
 
 	/* Remark: curl_easy_setopt() */
 	HTTPSE_CURL_SETOPT(rq->curl, ACCEPT_ENCODING, 

src/HttpseRuleset.h

@@ -69,7 +69,7 @@ typedef struct HttpseRulesetOptions
     .securecookie = 0L,               \
     .output = NULL,                   \
     .options = kHttpseRequestOptions, \
-    .num_threads = 1L,                \
+    .num_threads = 4L,                \
 }
 #endif